Docs: CSS fixes and their propagations

[slackapi]

Automatically synchronizing changes to CSS / navbar / footer across sites

[salesforce-cla]

Thanks for the contribution! Unfortunately we can't verify the commit author(s): slackapi[bot] <5***@U***.n***.g***.com>. One possible solution is to add that email to your GitHub account. Alternatively you can change your commits to another email and force push the change. After getting your commits associated with your GitHub account, sign the Salesforce Inc. Contributor License Agreement and this Pull Request will be revalidated.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.83%. Comparing base (2bebf5b) to head (0e2caf7).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2091   +/-   ##
=======================================
  Coverage   91.83%   91.83%           
=======================================
  Files          38       38           
  Lines       10263    10263           
  Branches      646      646           
=======================================
  Hits         9425     9425           
  Misses        826      826           
  Partials       12       12           

Flag	Coverage Δ
cli-hooks	95.23% <ø> (ø)
cli-test	95.69% <ø> (ø)
oauth	77.39% <ø> (ø)
socket-mode	58.22% <ø> (ø)
web-api	96.88% <ø> (ø)
webhook	96.65% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

[lukegalbraithrussell]

thank you bot