Bump actions/setup-python from 5.5.0 to 5.6.0 in /.github/workflows in the actions group #261

Job	Run time
ubuntu-latest with Python 3.10	1m 25s
macos-latest with Python 3.10	1m 19s
windows-latest with Python 3.10	2m 30s
ubuntu-latest with Python 3.9 and oldest versioned dependencies	1m 18s
ubuntu-latest with Python 3.11 and latest released version of dependencies	1m 17s
ubuntu-latest with Python 3.12 and latest or pre-release version of dependencies	1m 23s
ubuntu-latest with Python 3.12 and developer versioned dependencies	1m 40s
	10m 52s

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