Bump conda/actions from 24.5.0 to 24.8.0 in /.github/workflows #1611

Job	Run time
ubuntu-latest, Python 3.8, conda-standalone	10m 30s
ubuntu-latest, Python 3.9, conda-standalone	11m 33s
ubuntu-latest, Python 3.10, conda-standalone-nightly	10m 43s
ubuntu-latest, Python 3.11, micromamba	9m 25s
ubuntu-latest, Python 3.12, conda-standalone	10m 33s
macos-13, Python 3.8, conda-standalone-nightly	42m 23s
macos-latest, Python 3.11, conda-standalone	14m 56s
macos-latest, Python 3.12, micromamba	12m 41s
windows-latest, Python 3.8, conda-standalone	21m 11s
windows-latest, Python 3.9, conda-standalone-nightly	24m 20s
windows-latest, Python 3.10, conda-standalone	21m 19s
windows-latest, Python 3.11, conda-standalone-nightly	24m 51s
windows-latest, Python 3.12, conda-standalone	27m 45s
Report failures	0s
Canary Build	0s
	4h 2m 10s

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