Upgrade to x265 4.1 #965

Job	Run time
build (macos-13, x86_64, bash)	35m 12s
build (ubuntu-24.04, i686, bash)	53m 59s
build (windows-latest, AMD64, msys2 {0}, mingw-w64-x86_64, MINGW64)	1h 33m 7s
build (macos-14, arm64, bash)	12m 42s
build (ubuntu-24.04, x86_64, bash)	1h 10m 25s
build (ubuntu-24.04-arm, aarch64, bash)	41m 33s
	5h 6m 58s

Provide feedback