vote: update(owners): add LucaGuerra to owners #20

Job	Run time
build-test-master (amd64) / build-test	12m 32s
build-test-master (arm64) / build-test	9m 4s
push-images-master (amd64) / build-images	7m 53s
push-images-master (arm64) / build-images	6m 29s
images-master / push-manifest	12s
	36m 10s

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