Update boostbook from develop #3075

Job	Run time
b2-windows (windows-2019)	28m 32s
cmake-install-windows (windows-2019)	9m 13s
cmake-install-posix (ubuntu-20.04)	4m 10s
b2-windows (windows-2022)	30m 13s
b2-posix (ubuntu-20.04)	12m 57s
cmake-install-windows (windows-2022)	8m 48s
cmake-install-posix (ubuntu-22.04)	4m 35s
b2-posix (ubuntu-22.04)	12m 47s
cmake-install-posix (ubuntu-24.04)	5m 15s
b2-posix (ubuntu-24.04)	13m 17s
cmake-test-posix (ubuntu-latest)	47m 55s
cmake-install-posix (macos-13)	8m 29s
cmake-test-posix-quick (ubuntu-20.04)	1m 42s
b2-posix (macos-13)	25m 17s
cmake-install-posix (macos-14)	3m 50s
cmake-test-posix-quick (ubuntu-22.04)	1m 41s
b2-posix (macos-14)	11m 29s
cmake-install-posix (macos-15)	5m 15s
cmake-test-posix-quick (ubuntu-24.04)	2m 5s
b2-posix (macos-15)	12m 17s
cmake-test-posix-quick (macos-13)	4m 17s
cmake-test-posix-quick (macos-14)	4m 7s
cmake-test-posix-quick (macos-15)	4m 14s
cmake-test-windows-quick (windows-2019)	5m 19s
cmake-test-windows-quick (windows-2022)	5m 17s
	4h 33m 1s

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