CompatHelper: add new compat entry for GradedArrays at version 0.2 for package test, (keep existing compat)

[github-actions]

This pull request sets the compat entry for the GradedArrays package to 0.2 for package test.
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.
Note: Consider registering a new release of your package immediately after merging this PR, as downstream packages may depend on this for tests to pass.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.03%. Comparing base (97f202f) to head (7b2b49d).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #37   +/-   ##
=======================================
  Coverage   90.03%   90.03%           
=======================================
  Files          10       10           
  Lines         532      532           
=======================================
  Hits          479      479           
  Misses         53       53           

Flag	Coverage Δ
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