Update setup-miniconda actions configuration

[duncanmmacleod]

This PR updates the setup-miniconda action configuration to restore cache functionality.

[eagoetz]

@duncanmmacleod did the cache somehow get fixed? Also, my comments from the other thread in gwdetchar PR stand: we don't need to activate test (this happens by default) and why use miniforge when specifying conda-forge channels works? Thanks for your help!

[eagoetz]

@duncanmmacleod Similar to my comment over on gwdetchar, is this PR needed since caching seems broken? It looks like the use-only-tar-bz2: true is required for caching, so this PR doesn't actually restore cache functionality, as far as I can tell. See https://github.com/conda-incubator/setup-miniconda?tab=readme-ov-file#caching-packages

[duncanmmacleod]

@duncanmmacleod Similar to my comment over on gwdetchar, is this PR needed since caching seems broken? It looks like the use-only-tar-bz2: true is required for caching, so this PR doesn't actually restore cache functionality, as far as I can tell. See https://github.com/conda-incubator/setup-miniconda?tab=readme-ov-file#caching-packages

I think that might be a bogus statement in the docs. In the latest pipeline all of the Build and test jobs create caches. I reran one of the jobs, which then uses the cache the first run created, and everything is restored and used properly. See https://github.com/gwpy/gwsumm/actions/runs/12676464509/job/35330002826?pr=420.

See in particular the Total download: 0 B statement emitted during the Configure conda step.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 49.27%. Comparing base (720bd0c) to head (57c5e86).
Report is 14 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #420      +/-   ##
==========================================
- Coverage   49.64%   49.27%   -0.38%     
==========================================
  Files          60       60              
  Lines        8823     8789      -34     
==========================================
- Hits         4380     4330      -50     
- Misses       4443     4459      +16     

Flag	Coverage Δ
Linux	49.27% <ø> (-0.38%)	⬇️
macOS	49.27% <ø> (?)
python3.10	49.27% <ø> (-0.38%)	⬇️
python3.11	49.27% <ø> (-0.38%)	⬇️
python3.9	49.27% <ø> (-0.37%)	⬇️

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[eagoetz]

For consistency, can we revert the change of this line? By default test is activated.

Suggested change

	activate-environment: test
	auto-update-conda: true