CompatHelper: bump compat for MKL to 0.9, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the MKL package from 0.6 to 0.6, 0.9.
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 79.60%. Comparing base (17fde86) to head (72ff612).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #15   +/-   ##
=======================================
  Coverage   79.60%   79.60%           
=======================================
  Files           5        5           
  Lines         201      201           
=======================================
  Hits          160      160           
  Misses         41       41           

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