Bump docker/build-push-action from 4 to 6 #3281

Job	Run time
lint / clang-format	9s
lint / shell-lint	14s
lint / python-lint	5s
ubuntu / gcc-build (ubuntu-24.04-arm, Release)	3m 5s
ubuntu / gcc-build (ubuntu-24.04, Release)	1m 14s
mac / clang-build (Debug)	1m 58s
ubuntu / clang-build (ubuntu-24.04-arm)	3m 6s
ubuntu / gcc-build (ubuntu-24.04, Debug)	2m 21s
mac / clang-build (Release)	1m 52s
ubuntu / gcc-build (ubuntu-24.04-arm, Debug)	3m 28s
windows / msvc-build (Release)	2m 49s
ubuntu / clang-build (ubuntu-24.04)	1m 34s
windows / msvc-build (Debug)	5m 23s
windows / clang-build	2m 16s
windows / clang-test	1m 53s
mac / clang-test	3m 32s
ubuntu / clang-test (ubuntu-24.04-arm)	5m 52s
ubuntu / clang-sanitizer-build (ubuntu-24.04)	1m 39s
ubuntu / clang-test (ubuntu-24.04)	6m 3s
ubuntu / gcc-test (ubuntu-24.04)	4m 51s
ubuntu / gcc-test (ubuntu-24.04-arm)	5m 20s
windows / clang-test-extended	2m 8s
windows / msvc-test	3m 8s
mac / clang-test-extended	2m 15s
windows / msvc-test-extended	2m 2s
ubuntu / clang-sanitizer-test (ubuntu-24.04)	2m 11s
ubuntu / clang-test-extended (ubuntu-24.04)	4m 6s
ubuntu / clang-test-extended (ubuntu-24.04-arm)	4m 16s
ubuntu / gcc-test-extended (ubuntu-24.04-arm)	3m 46s
ubuntu / gcc-test-extended (ubuntu-24.04)	2m 46s
ubuntu / clang-sanitizer-test-extended (ubuntu-24.04)	3m 0s
ubuntu / gcc-build-codecov	4m 3s
perf / ubuntu-gcc-build-perf-stats	2m 15s
pages / build-scoreboard	15s
pages / build-doxygen-xml	20s
pages / build-sphinx	1m 31s
pages / deploy-pages	0s
	1h 36m 46s

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