build(deps): bump actions/setup-python from 6.2.0 to 6.3.0 in the actions group #817

Job	Run time
selftest-xfail-verify-missing-options (false, https://token.actions.githubusercontent.com)	14s
selftest-xfail-verify-missing-options (false, https://github.com/sigstore/gh-action-sigstore-pyth...	14s
selftest-xfail-verify-missing-options (true)	16s
selftest-runner-python (ubuntu-latest)	15s
selftest-xfail-invalid-inputs (/tmp/extremely-nonexistent-file)	16s
selftest-staging	31s
selftest-xfail-invalid-inputs (--this-should-not-work)	17s
selftest-whitespace (ubuntu-latest)	15s
selftest-whitespace (macos-latest)	16s
selftest-xfail-glob-input-expansion	15s
selftest-xfail-verify-missing-options (true, https://github.com/sigstore/gh-action-sigstore-pytho...	17s
selftest-upload-artifacts	23s
selftest (macos-latest, 3.14)	20s
selftest-xfail-verify-missing-options (true, https://token.actions.githubusercontent.com)	15s
selftest-identity-token	19s
selftest-glob	23s
selftest (ubuntu-latest, 3.14)	27s
selftest-whitespace (windows-latest)	40s
selftest (windows-latest, 3.14)	36s
selftest-glob-multiple	22s
selftest (macos-latest, 3.x)	26s
selftest (ubuntu-latest, 3.x)	18s
selftest (windows-latest, 3.x)	31s
selftest (windows-latest, 3.10)	39s
selftest (macos-latest, 3.10)	46s
selftest (ubuntu-latest, platform-default)	14s
selftest (ubuntu-latest, 3.10)	24s
selftest-verify	22s
all-selftests-pass	5s
	10m 36s

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