chore(ci): update librarian workflow names #19716

Job	Run time
gitignore_correctness	42s
package_name_check	29s
root-pom	1m 8s
gapic-bom	1m 16s
group_id_check_for_maps_libraries	8m 41s
owlbot-yaml	33s
owlbot-py	51s
generate-readme	42s
	14m 22s

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