Bump OpenAstronomy/github-actions-workflows from 1.14.0 to 1.15.0 in … #2268

Job	Run time
environment	1s
crds_contexts / retrieve latest CRDS contexts	5s
test / Load tox environments	6s
test_upstream / Load tox environments	5s
test_upstream / rad (ubuntu-latest)	1m 15s
romancal / Load tox environments	3s
test / py311-oldestdeps-cov (ubuntu-latest)	1m 53s
test / py311-cov (ubuntu-latest)	1m 43s
test / py312-withromancal-cov (ubuntu-latest)	2m 41s
test / py313 (ubuntu-latest)	1m 22s
test / py312 (macos-latest)	1m 9s
romancal / romancal (ubuntu-latest)	4m 20s
	14m 43s

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