GHA Docker: set cpp-examples-collection to latest commit #356

Job	Run time
Build (docker-linux-arm64)	28m 13s
Build (linux-arm64)	13m 46s
Build (macos-arm64)	14m 13s
Build (windows-x64)	38m 51s
Build (macos-x64)	22m 59s
Build (docker-linux-x64)	38m 29s
Build (linux-x64)	18m 3s
Build (cpp-example-collection-linux-arm64)	1m 0s
Build (cpp-example-collection-x64)	59s
	2h 56m 33s

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