Fix: fix improve this content on GitHub link

[Asartea]

Because

• The current link points to a nonexistent file

This PR

• Fixes the link

Issue

Closes #4101

Pull Request Requirements

• I have thoroughly read and understand The Odin Project Contributing Guide
• The title of this PR follows the keyword: brief description of change format, using one of the following keywords:
• Feature - adds new or amends existing user-facing behavior
• Chore - changes that have no user-facing value, refactors, dependency bumps, etc
• Fix - bug fixes
• The Because section summarizes the reason for this PR
• The This PR section has a bullet point list describing the changes in this PR
• I have verified all tests and linters pass after making these changes.
• If this PR addresses an open issue, it is linked in the Issue section

[KevinMulhern]

LGTM, thanks @Asartea

Sidenote, during QA I noticed the community expectations page has the same issue. Would you be up for fixing that one in this PR too?

[KevinMulhern]

Sorry for wasting your time with this one @Asartea, I didn't think we'd be getting this change in as quickly as we did. It changes the same area and fixes the issues this PR addresses. With it being the longer term way we want to handle the lesson footer links, it got the priority in this instance.

[Asartea]

np