Citus 11.3 documentation update checklist

[pinodeca]

• Ensure git cherry-picks up to date on master branch
• Bump version
  • :vimgrep '\(\<11\.\?2\>\)\|\(112_\)' **/*.rst *.py
• Update installation (need input from Citus 11.3 package testing checklist #1079)
• Update our upgrade steps (need input from Citus 11.3 package testing checklist #1079)
• Update citusdata.com/download links.
• scan for any other udf and guc changes (in Community and Enterprise)
  • git diff origin/release-11.2 origin/release-11.3 -- src/backend/distributed/shared_library_init.c
  • git diff origin/release-11.2 origin/release-11.3 -- src/backend/distributed/sql/udfs/
  • Also check Changelog entries for 11.3.0 citus#6856
• Verify there are no Sphinx warnings in local build
  • sphinx-build -b html -a -n -W . _build
  • (Remove _build directory and try fresh too)
• Create new 11.3 release branch
• Test that the search box works in the new release branch
• Set as default ver in RTD (advanced settings tab)
• Rebuild previous version so that canonical link gets updated
• Re-check old versions (does the version picker work, does search work)