Update Reps Council on Leadership page after H1 2022 elections

[MichaelKohler]

One-line summary

This adjusts the Reps Council group on the Leadership page after the latest H1 2022 Reps Council elections. Announcement here: https://discourse.mozilla.org/t/important-council-elections-h1-2022-results-announcement/96411

Significant changes and points to review

• 3 people removed, 3 new people added
• New images have been run through ImageOptim

Screenshots

To test this work:

• Go to /en-US/about/leadership/#reps-council
• Make sure all images show up and links work correctly

[codecov]

Codecov Report

Merging #11556 (0ea8149) into main (b0125de) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main   #11556   +/-   ##
=======================================
  Coverage   77.07%   77.07%           
=======================================
  Files         144      144           
  Lines        7559     7559           
=======================================
  Hits         5826     5826           
  Misses       1733     1733           

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[craigcook]

Looks good! ☄️