CI : Update to GafferHQ/dependencies 11.0.0a4 #1761

Job	Run time
build (linux-platform24)	19m 21s
build (windows-platform25)	25m 58s
build (macos-arm64-platform25)	9m 24s
build (windows-debug-platform25)	20m 57s
build (linux-debug-platform25)	14m 44s
build (linux-platform25)	18m 17s
	1h 48m 41s

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