[CI] Limit Pages write permissions to deploy job #5111

Job	Run time
ci-scope	6s
pre-commit / pre-commit	2m 26s
pre-commit / link-check	16s
windows / clang-build	4m 19s
mac / clang-build (Release)	1m 56s
ubuntu / clang-build (ubuntu-26.04)	2m 43s
mac / clang-build (Debug)	2m 7s
ubuntu / gcc-build (ubuntu-26.04, Release)	2m 28s
windows / msvc-build (Debug)	3m 27s
windows / msvc-build (Release)	2m 51s
ubuntu / gcc-build (ubuntu-26.04, Debug)	1m 58s
mac / clang-test	1m 36s
ubuntu / gcc-test (ubuntu-26.04)	2m 32s
ubuntu / clang-test (ubuntu-26.04)	2m 37s
ubuntu / clang-sanitizer-build (ubuntu-26.04)	3m 30s
windows / msvc-test	1m 45s
mac / clang-test-extended	1m 21s
windows / clang-test	1m 22s
ubuntu / gcc-test-extended (ubuntu-26.04)	1m 53s
windows / msvc-test-extended	1m 29s
ubuntu / clang-test-extended (ubuntu-26.04)	1m 44s
windows / clang-test-extended	1m 38s
ubuntu / clang-sanitizer-test (ubuntu-26.04)	1m 0s
ubuntu / gcc-build-codecov	4m 15s
ubuntu / clang-sanitizer-test-extended (ubuntu-26.04)	54s
perf / ubuntu-gcc-build-perf-stats	50s
perf / macos-clang-build-perf-stats	1m 46s
pages / build-doxygen-xml	15s
pages / build-scoreboard	20s
pages / build-sphinx	39s
pages / deploy-pages	0s
	56m 3s

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