chore: update docs, use newer RGB24 update method in test app #26

Job	Run time
Detect version	9s
Build libdmdutil-win-x64	1m 50s
Build libdmdutil-win-x86	1m 56s
Build libdmdutil-macos-arm64	1m 19s
Build libdmdutil-macos-x64	1m 29s
Build libdmdutil-linux-x64	42s
Build libdmdutil-linux-aarch64	6m 24s
Build libdmdutil-android-arm64-v8a	22s
Build libdmdutil-ios-arm64	48s
Build libdmdutil-tvos-arm64	25s
Build libdmdutil-macos	12s
	15m 36s

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