Set cmake generator version explicitely #1313

Job	Run time
build_debian_buster	1m 2s
build_android	7m 50s
build_debian_bookworm	1m 6s
build_debian_bullseye	59s
build_debian_sid	1m 9s
build_macos_arm	1m 34s
build_macos_intel	3m 24s
build_raspios_bullseye_armhf	21s
build_ubuntu_jammy	56s
build_ubuntu_mantic	1m 8s
build_ubuntu_focal	1m 0s
build_ubuntu_noble	52s
build_windows	6m 52s
check_formatting	13s
check_spelling	17s
create_full_archive	0s
update_nightly_release	0s
	28m 43s

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