CompatHelper: bump compat for MatrixAlgebraKit to 0.3, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the MatrixAlgebraKit package from 0.2 to 0.2, 0.3.
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 76.29%. Comparing base (02c7dea) to head (d9645fe).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #39      +/-   ##
==========================================
+ Coverage   76.23%   76.29%   +0.05%     
==========================================
  Files          13       13              
  Lines         867      869       +2     
==========================================
+ Hits          661      663       +2     
  Misses        206      206              

Flag	Coverage Δ
docs	0.00% <0.00%> (ø)

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