Pin docs workflow to v12 and build docs on tags

[jeromekelleher]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (e2756dd) to head (8a5b54a).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #173   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            8         8           
  Lines          348       348           
  Branches        43        43           
=========================================
  Hits           348       348           

Flag	Coverage Δ
python-tests	100.00% <ø> (ø)

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