Issues with labs/introduction

[jweeks2023]

princomp.github.io/source/labs/Introduction.md

Lines 12 to 14 in c3c4fb7

	#. [How to access the material and navigate our resources](#navigating-our-resources-1),
	#. [What to read first](#what-to-read-first-1),
	#. [How to get help](#how-to-get-help-1).

These links do not actually redirect to the corresponding sections in the page.

princomp.github.io/source/labs/Introduction.md

Line 59 in c3c4fb7

This is particularly true for labs asking for you to set things up; there is little to gain in postponing that step, and if you are facing difficulties, it is better [to ask](#how-to-get-help-1) earlier rather than later!

Same as above

princomp.github.io/source/labs/Introduction.md

Line 105 in c3c4fb7

~ _If you feel like it_, create an account on [Github](https://github.com/login) and [leave a comment](#how-is-this-page)! We'll be happy to read from you!

Same as above

[aubertc]

This whole lab probably deserves a rewriting.

[whmarsh87]

Looking at the website, it appears to be linking all three to the first header. To which, (#navigating-our-resources-1) does link to the correct Header. However, since they all link to it, it leads me to believe with no anchor declared, it just defaults to the next header it can find.

Explicitly declaring anchors for the headers might address this issue: