chore(deps): update dependency markdown to v3.8

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
markdown (changelog)	3.3.6 -> 3.8

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Release Notes

Python-Markdown/markdown (markdown)

v3.8

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Changed

• DRY fix in abbr extension by introducing method create_element (#​1483).
• Clean up test directory by removing some redundant tests and port
  non-redundant cases to the newer test framework.
• Improved performance of the raw HTML post-processor (#​1510).

Fixed

• Backslash Unescape IDs set via attr_list on toc (#​1493).
• Ensure md_in_html processes content inside "markdown" blocks as they are
  parsed outside of "markdown" blocks to keep things more consistent for
  third-party extensions (#​1503).
• md_in_html handle tags within inline code blocks better (#​1075).
• md_in_html fix handling of one-liner block HTML handling (#​1074).
• Ensure <center> is treated like a block-level element (#​1481).
• Ensure that abbr extension respects AtomicString and does not process
  perceived abbreviations in these strings (#​1512).
• Ensure smarty extension correctly renders nested closing quotes (#​1514).

v3.7

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Changed

Refactor abbr Extension

A new AbbrTreeprocessor has been introduced, which replaces the now deprecated
AbbrInlineProcessor. Abbreviation processing now happens after Attribute Lists,
avoiding a conflict between the two extensions (#​1460).

The AbbrPreprocessor class has been renamed to AbbrBlockprocessor, which
better reflects what it is. AbbrPreprocessor has been deprecated.

A call to Markdown.reset() now clears all previously defined abbreviations.

Abbreviations are now sorted by length before executing AbbrTreeprocessor
to ensure that multi-word abbreviations are implemented even if an abbreviation
exists for one of those component words. (#​1465)

Abbreviations without a definition are now ignored. This avoids applying
abbr tags to text without a title value.

Added an optional glossary configuration option to the abbreviations extension.
This provides a simple and efficient way to apply a dictionary of abbreviations
to every page.

Abbreviations can now be disabled by setting their definition to "" or ''.
This can be useful when using the glossary option.

Fixed

• Fixed links to source code on GitHub from the documentation (#​1453).

v3.6

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Changed

Refactor TOC Sanitation

• All postprocessors are now run on heading content.
• Footnote references are now stripped from heading content. Fixes #​660.
• A more robust striptags is provided to convert headings to plain text.
  Unlike, the markupsafe implementation, HTML entities are not unescaped.
• The plain text name, rich html, and unescaped raw data-toc-label are
  saved to toc_tokens, allowing users to access the full rich text content of
  the headings directly from toc_tokens.
• The value of data-toc-label is sanitized separate from heading content
  before being written to name. This fixes a bug which allowed markup through
  in certain circumstances. To access the raw unsanitized data, retrieve the
  value from token['data-toc-label'] directly.
• An html.unescape call is made just prior to calling slugify so that
  slugify only operates on Unicode characters. Note that html.unescape is
  not run on name, html, or data-toc-label.
• The functions get_name and stashedHTML2text defined in the toc extension
  are both deprecated. Instead, third party extensions should use some
  combination of the new functions run_postprocessors, render_inner_html and
  striptags.

Fixed

• Include scripts/*.py in the generated source tarballs (#​1430).
• Ensure lines after heading in loose list are properly detabbed (#​1443).
• Give smarty tree processor higher priority than toc (#​1440).
• Permit carets (^) and square brackets (]) but explicitly exclude
  backslashes (\) from abbreviations (#​1444).
• In attribute lists (attr_list, fenced_code), quoted attribute values are
  now allowed to contain curly braces (}) (#​1414).

v3.5.2

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Fixed

• Fix type annotations for convertFile - it accepts only bytes-based buffers.
  Also remove legacy checks from Python 2 (#​1400)
• Remove legacy import needed only in Python 2 (#​1403)
• Fix typo that left the attribute AdmonitionProcessor.content_indent unset
  (#​1404)
• Fix edge-case crash in InlineProcessor with AtomicString (#​1406).
• Fix edge-case crash in codehilite with an empty code tag (#​1405).
• Improve and expand type annotations in the code base (#​1401).
• Fix handling of bogus comments (#​1425).

v3.5.1

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Fixed

• Fix a performance problem with HTML extraction where large HTML input could
  trigger quadratic line counting behavior (#​1392).
• Improve and expand type annotations in the code base (#​1394).

v3.5

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v3.4.4

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v3.4.3

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v3.4.2

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v3.4.1

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v3.4

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v3.3.7

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⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

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The artifact failure details are included below:

File name: poetry.lock

Updating dependencies
Resolving dependencies...

The "poetry.dev-dependencies" section is deprecated and will be removed in a future version. Use "poetry.group.dev.dependencies" instead.
Creating virtualenv todo-bot-p8ErBURW-py3.10 in /home/ubuntu/.cache/pypoetry/virtualenvs

The current project's supported Python range (>=3.8,<3.11) is not compatible with some of the required packages Python requirement:
  - markdown requires Python >=3.9, so it will not be installable for Python >=3.8,<3.9

Because todo-bot depends on markdown (3.8) which requires Python >=3.9, version solving failed.

  * Check your dependencies Python requirement: The Python requirement can be specified via the `python` or `markers` properties

    For markdown, a possible solution would be to set the `python` property to ">=3.9,<3.11"

    https://python-poetry.org/docs/dependency-specification/#python-restricted-dependencies,
    https://python-poetry.org/docs/dependency-specification/#using-environment-markers