chore(deps): update googleapis/java-cloud-bom action to v26.51.0 #12985

Job	Run time
gapic-bom	1m 0s
generate-readme	44s
group_id_check_for_maps_libraries	5m 44s
owlbot-py	48s
gitignore_correctness	38s
owlbot-yaml	38s
root-pom	1m 2s
package_name_check	39s
	11m 13s

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