Bump actions/checkout from 6 to 7 in the actions group #4195

Job	Run time
test_docs	51s
Test Minimum Versions	2m 52s
check_release	1m 55s
Test Lint	1m 12s
build (ubuntu-latest, qt5, 3.10)	2m 50s
test_without_debugpy (ubuntu-latest, 3.10)	2m 20s
build (ubuntu-latest, qt5, pypy-3.11)	3m 32s
build (windows-latest, qt6, 3.12)	4m 25s
build (windows-latest, qt6, 3.10)	4m 52s
build (ubuntu-latest, qt5, 3.14)	2m 39s
build (macos-latest, qt6, 3.12)	2m 49s
build (macos-latest, qt6, pypy-3.11)	4m 58s
build (windows-latest, qt6, 3.11)	3m 52s
build (macos-latest, qt5, 3.14)	3m 4s
build (macos-latest, qt5, 3.10)	3m 2s
build (macos-latest, qt6, 3.13)	2m 41s
build (macos-latest, qt6, 3.11)	2m 47s
build (ubuntu-latest, qt6, 3.12)	2m 45s
build (windows-latest, qt5, 3.10)	4m 7s
link_check	2m 0s
build (windows-latest, qt6, pypy-3.11)	4m 56s
build (macos-latest, qt5, pypy-3.11)	5m 38s
Make SDist	33s
build (ubuntu-latest, qt6, 3.10)	2m 48s
build (ubuntu-latest, qt6, 3.13)	2m 52s
build (ubuntu-latest, qt6, pypy-3.11)	3m 11s
build (windows-latest, qt6, 3.13)	4m 20s
build (windows-latest, qt5, 3.14)	4m 34s
build (macos-latest, qt6, 3.10)	3m 26s
Test Prereleases	2m 38s
build (windows-latest, qt5, pypy-3.11)	5m 35s
build (ubuntu-latest, qt6, 3.11)	2m 47s
Install from SDist and Test	2m 33s
coverage	9s
	1h 45m 33s

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