Bump docker/build-push-action from 4 to 6 #3280

Job	Run time
lint / clang-format	10s
lint / python-lint	7s
lint / shell-lint	11s
mac / clang-build (Debug)	2m 6s
mac / clang-build (Release)	1m 55s
ubuntu / clang-build (ubuntu-24.04-arm)	2m 31s
ubuntu / clang-build (ubuntu-24.04)	2m 26s
ubuntu / gcc-build (ubuntu-24.04, Release)	1m 32s
windows / msvc-build (Release)	2m 6s
ubuntu / gcc-build (ubuntu-24.04, Debug)	2m 34s
windows / clang-build	2m 42s
ubuntu / gcc-build (ubuntu-24.04-arm, Debug)	2m 13s
ubuntu / gcc-build (ubuntu-24.04-arm, Release)	3m 40s
windows / msvc-build (Debug)	5m 35s
windows / clang-test	2m 39s
windows / msvc-test	3m 3s
windows / clang-test-extended	2m 6s
mac / clang-test	3m 15s
ubuntu / clang-test (ubuntu-24.04)	5m 23s
ubuntu / clang-test (ubuntu-24.04-arm)	6m 10s
ubuntu / clang-sanitizer-build (ubuntu-24.04)	1m 37s
windows / msvc-test-extended	2m 32s
mac / clang-test-extended	2m 26s
ubuntu / gcc-test (ubuntu-24.04-arm)	5m 27s
ubuntu / gcc-test (ubuntu-24.04)	5m 0s
ubuntu / clang-sanitizer-test (ubuntu-24.04)	2m 19s
ubuntu / clang-test-extended (ubuntu-24.04)	3m 5s
ubuntu / clang-test-extended (ubuntu-24.04-arm)	5m 14s
ubuntu / clang-sanitizer-test-extended (ubuntu-24.04)	1m 52s
ubuntu / gcc-test-extended (ubuntu-24.04)	2m 59s
ubuntu / gcc-test-extended (ubuntu-24.04-arm)	4m 8s
ubuntu / gcc-build-codecov	4m 36s
perf / ubuntu-gcc-build-perf-stats	2m 31s
pages / build-scoreboard	17s
pages / build-doxygen-xml	21s
pages / build-sphinx	1m 41s
pages / deploy-pages	-1s
	1h 38m 28s

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