chore: update librarian to v0.28.0#13855

Merged

suztomo merged 1 commit into

googleapis:mainfrom

suztomo:chore-update-librarian-2026-07-21

Jul 21, 2026

Google CLA / cla/google succeeded Jul 21, 2026 in 7s

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✅ 4141f30 Author: @suztomo <su****o@gmail.com>

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