chore(deps): bump sass to v1.79 and sass-loader to v16

[bradenmacdonald]

These need to be bumped at the same time or else we get a ton of console warnings during the build.

This builds/runs fine and I clicked through the MFE looking for issues but didn't see any.

[openedx-webhooks]

Thanks for the pull request, @bradenmacdonald!

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.49%. Comparing base (f5f6747) to head (29311da).
Report is 6 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1490   +/-   ##
=======================================
  Coverage   88.49%   88.49%           
=======================================
  Files         310      310           
  Lines        5330     5330           
  Branches     1355     1355           
=======================================
  Hits         4717     4717           
  Misses        596      596           
  Partials       17       17           

☔ View full report in Codecov by Sentry.
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[farhaanbukhsh]

👍

• ✅ I tested this on tutor devstack and it looks good.
• ✅ I read through the code
• ❌ I checked for accessibility issues
• ❌ Includes documentation
• ❌ I made sure any change in configuration variables is reflected in the corresponding client's configuration-secure repository.