chore: pin GH Actions #1251

Job	Run time
build (macos-15, nitro-module, kotlin-swift)	16m 16s
build (ubuntu-latest, turbo-module, kotlin-objc)	6m 47s
build (ubuntu-latest, fabric-view, kotlin-objc)	6m 46s
build (macos-15, fabric-view, kotlin-objc)	12m 27s
build (macos-15, turbo-module, kotlin-objc)	18m 16s
build (ubuntu-latest, nitro-module, kotlin-swift)	2m 2s
build (ubuntu-latest, library, js)	1m 49s
	1h 4m 23s

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