deps: update repo-automation-bots digest to 6662ddc #9379

Job	Run time
build (11)	14m 53s
build(21) except self-service clients	13m 54s
build (17)	14m 53s
build(8) except for gapic-generator-java	4m 30s
build(8) for gapic-generator-java	11m 32s
compatibility	1m 38s
lint	31s
showcase (11)	4m 26s
showcase-clirr	3m 2s
showcase-native	8m 48s
showcase (17)	4m 17s
showcase (21)	4m 14s
dependency_analyzer_unit_test	19s
gapic-generator-java-bom	1m 46s
unmanaged_dependency_check	3m 53s
	1h 32m 36s

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