(MAINT) Update install.md w/ supported OSs; release note fixes

[sanfrancrisko]

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[codecov]

Codecov Report

Merging #1138 (a3df087) into main (03095a0) will not change coverage.
The diff coverage is n/a.

❗ Current head a3df087 differs from pull request most recent head 7dfae0e. Consider uploading reports for the commit 7dfae0e to get more accurate results

@@           Coverage Diff           @@
##             main    #1138   +/-   ##
=======================================
  Coverage   91.25%   91.25%           
=======================================
  Files         137      137           
  Lines        5578     5578           
=======================================
  Hits         5090     5090           
  Misses        488      488           

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