[GHA] check for broken links

[AshleyDumaine]

What type of PR is this?

What this PR does / why we need it: This will try to catch broken links in our docs (via https://github.com/ruzickap/action-my-broken-link-checker) before we publish them so we can address any issues if they arise.

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

Special notes for your reviewer:

TODOs:

• squashed commits
• includes documentation
• adds unit tests
• adds or updates e2e tests

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 42.35%. Comparing base (ca3cd20) to head (5ec8d58).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #237   +/-   ##
=======================================
  Coverage   42.35%   42.35%           
=======================================
  Files          26       26           
  Lines        1419     1419           
=======================================
  Hits          601      601           
  Misses        804      804           
  Partials       14       14           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.