Bump actions/checkout from 6 to 7 (#836) #5104

Job	Run time
ci-scope	3s
pre-commit / pre-commit	2m 8s
pre-commit / link-check	17s
mac / clang-build (Release)	1m 57s
mac / clang-build (Debug)	1m 55s
ubuntu / gcc-build (ubuntu-26.04, Debug)	2m 20s
ubuntu / gcc-build (ubuntu-26.04, Release)	2m 19s
windows / clang-build	2m 27s
windows / msvc-build (Release)	2m 6s
windows / msvc-build (Debug)	2m 58s
ubuntu / clang-build (ubuntu-26.04)	3m 16s
mac / clang-test	1m 26s
ubuntu / gcc-test (ubuntu-26.04)	2m 40s
windows / clang-test	1m 35s
windows / msvc-test	2m 43s
ubuntu / clang-test (ubuntu-26.04)	2m 34s
ubuntu / clang-sanitizer-build (ubuntu-26.04)	3m 8s
mac / clang-test-extended	1m 44s
windows / clang-test-extended	1m 21s
ubuntu / gcc-test-extended (ubuntu-26.04)	1m 37s
windows / msvc-test-extended	1m 47s
ubuntu / clang-test-extended (ubuntu-26.04)	1m 39s
ubuntu / clang-sanitizer-test (ubuntu-26.04)	1m 1s
ubuntu / clang-sanitizer-test-extended (ubuntu-26.04)	1m 7s
ubuntu / gcc-build-codecov	4m 7s
perf / macos-clang-build-perf-stats	1m 43s
perf / ubuntu-gcc-build-perf-stats	1m 11s
pages / build-scoreboard	19s
pages / build-doxygen-xml	13s
pages / build-sphinx	37s
pages / deploy-pages	18s
	54m 36s

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