CompatHelper: bump compat for ClusterManagers to 2, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the ClusterManagers package from 0.4.6, 1 to 0.4.6, 1, 2.
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 66.77%. Comparing base (72ad5eb) to head (2f6289c).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #23   +/-   ##
=======================================
  Coverage   66.77%   66.77%           
=======================================
  Files          20       20           
  Lines        1514     1514           
=======================================
  Hits         1011     1011           
  Misses        503      503           

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