chore: Update linkchecker to report 404 errors only

[britneywwc]

Done

• [List of work items including drive-bys - remember to add the why and what of this work.]

QA

• Check out this feature branch
• Run the site using the command ./run serve or dotrun
• View the site locally in your web browser at: http://0.0.0.0:8001/
  • Be sure to test on mobile, tablet and desktop screen sizes
• [List additional steps to QA the new features or prove the bug has been resolved]

Issue / Card

Fixes WD-19063

Screenshots

[If relevant, please include a screenshot.]

Help

QA steps - Commit guidelines

[webteam-app]

Demo

Jenkins

demos.haus

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.26%. Comparing base (58a37db) to head (7d2b9e7).
Report is 17 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #14722      +/-   ##
==========================================
- Coverage   72.32%   72.26%   -0.06%     
==========================================
  Files         120      120              
  Lines        3404     3404              
  Branches     1172     1172              
==========================================
- Hits         2462     2460       -2     
- Misses        917      919       +2     
  Partials       25       25              

see 1 file with indirect coverage changes