build(deps): bump gradle/actions from 5 to 6 #296

Job	Run time
android / loader	1m 35s
android / build-helloxr	2m 11s
msvc-build / msvc-build (arm64_uwp) / msvc-build	4m 31s
msvc-build / msvc-build (x64_uwp) / msvc-build	5m 13s
msvc-build / msvc-build (x64) / msvc-build	5m 19s
msvc-build / msvc-build (win32_uwp) / msvc-build	4m 17s
msvc-build / msvc-build (win32) / msvc-build	3m 57s
msvc-build / organize-and-release-artifacts	0s
	27m 3s

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