CompatHelper: bump compat for AlgebraOfGraphics in [weakdeps] to 0.12, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the AlgebraOfGraphics package from 0.8, 0.9, 0.10, 0.11 to 0.8, 0.9, 0.10, 0.11, 0.12.
This keeps the compat entries for earlier versions.

Note: I have not tested your package with this new compat entry.
It is your responsibility to make sure that your package tests pass before you merge this pull request.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.44%. Comparing base (e71bcbb) to head (e7b531a).
⚠️ Report is 1 commits behind head on main.

❗ There is a different number of reports uploaded between BASE (e71bcbb) and HEAD (e7b531a). Click for more details.

HEAD has 5 uploads less than BASE

Flag	BASE (e71bcbb)	HEAD (e7b531a)
	6	1

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1145      +/-   ##
==========================================
- Coverage   86.91%   79.44%   -7.48%     
==========================================
  Files          55       55              
  Lines        5341     5331      -10     
==========================================
- Hits         4642     4235     -407     
- Misses        699     1096     +397     

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