Remove docs warning re bad footnote chars
What does this MR do and why?
Remove documentation guidance to avoid using the character "w" in a markdown footnote reference. The related upstream bug is now fixed and this guidance is no longer relevant as of a recent release (exact version TBC).
Screenshots or screen recordings
This is a docs followup after an upstream bug in markdown rendering was fixed. Happy to assist if asked, but I think screenshots/recordings aren't likely to be useful here.
How to set up and validate locally
- Related to #24423 (closed)
- Confirm that the fix is merged in current Gitlab
- Consider whether the docs could still be useful
MR acceptance checklist
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I have evaluated the MR acceptance checklist for this MR.
This MR is a Documentation change. The docs fix relates to an MR which doesn't look like it included a CHANGELOG modification - I don't see CHANGELOG.md in !70612 (diffs) and I don't see the word "footnote" at https://gitlab.com/gitlab-org/gitlab/-/blob/45da3d6db7679226b2faf030e2398feb8246a0b1/CHANGELOG.md
I considered whether it was correct to remove the sentence "Reference tags can use letters and other characters.". I didn't feel that this sentence added meaningfully to the documentation on page once the remainder of the paragraph was removed. Input welcome!
Related to #24423 (closed)