Bump actions/download-artifact from 5 to 6 #4228

Job	Run time
pre-commit / pre-commit	1m 6s
ubuntu / clang-build (ubuntu-24.04)	3m 3s
ubuntu / clang-build (ubuntu-24.04-arm)	1m 57s
ubuntu / gcc-build (ubuntu-24.04, Release)	2m 18s
ubuntu / gcc-build (ubuntu-24.04-arm, Release)	2m 26s
mac / clang-build (Release)	2m 38s
ubuntu / gcc-build (ubuntu-24.04, Debug)	2m 34s
windows / msvc-build (Debug)	3m 2s
ubuntu / gcc-build (ubuntu-24.04-arm, Debug)	1m 52s
windows / clang-build	3m 54s
mac / clang-build (Debug)	2m 17s
windows / msvc-build (Release)	4m 30s
ubuntu / gcc-test (ubuntu-24.04)	8m 25s
ubuntu / gcc-test (ubuntu-24.04-arm)	8m 18s
mac / clang-test	4m 50s
ubuntu / clang-test (ubuntu-24.04-arm)	8m 20s
ubuntu / clang-test (ubuntu-24.04)	8m 36s
ubuntu / clang-sanitizer-build (ubuntu-24.04)	3m 21s
windows / clang-test	3m 15s
windows / msvc-test	5m 15s
windows / clang-test-extended	2m 54s
mac / clang-test-extended	3m 23s
ubuntu / clang-sanitizer-test (ubuntu-24.04)	2m 50s
ubuntu / gcc-test-extended (ubuntu-24.04-arm)	4m 30s
ubuntu / gcc-test-extended (ubuntu-24.04)	4m 32s
windows / msvc-test-extended	3m 13s
ubuntu / clang-test-extended (ubuntu-24.04-arm)	4m 33s
ubuntu / clang-test-extended (ubuntu-24.04)	4m 43s
ubuntu / clang-sanitizer-test-extended (ubuntu-24.04)	2m 21s
ubuntu / gcc-build-codecov	7m 27s
perf / ubuntu-gcc-build-perf-stats	1m 19s
perf / macos-clang-build-perf-stats	2m 11s
pages / build-scoreboard	18s
pages / build-doxygen-xml	56s
pages / build-sphinx	47s
pages / deploy-pages	0s
	2h 7m 54s

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