chore: update plugin version pom template #6390

Job	Run time
build(8) except for gapic-generator-java	3m 59s
build(21) except self-service clients	11m 28s
build (11)	12m 19s
build (17)	12m 26s
lint	26s
build(8) for gapic-generator-java	9m 14s
compatibility	1m 27s
dependency_analyzer_unit_test	18s
gapic-generator-java-bom	2m 2s
showcase (11)	4m 6s
showcase (17)	4m 8s
showcase-clirr	2m 58s
unmanaged_dependency_check	5m 51s
showcase-native	8m 31s
	1h 19m 13s

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