CompatHelper: bump compat for HerbCore to 1, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the HerbCore package from 0.3.4 to 0.3.4, 1.
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 93.66%. Comparing base (4db97d2) to head (e0b96c9).
⚠️ Report is 7 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #59   +/-   ##
=======================================
  Coverage   93.66%   93.66%           
=======================================
  Files           3        3           
  Lines         379      379           
=======================================
  Hits          355      355           
  Misses         24       24           

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