[DOCS] Get Started MD link broken

[dgwyer]

Issue Type

• Existing documentation (e.g. typos, errors, outdated information)
• Suggest new documentation that is currently missing

Current Behavior or Documentation Gaps
On the (root) Get Started docs the 'CommonMark' MD link is broken. This is probably a Quarto bug as Jeremy mentioned here.

Confirmation
Please confirm the following:

• I have checked the existing issues and pull requests to ensure this documentation issue hasn't been reported before.
• I have read the project's documentation and am confident this issue or suggestion is valid.