chore: Update generation configuration at Wed May 21 02:31:39 UTC 2025 (#3888)

Author: cloud-java-bot

generation_config.yaml

@@ -1,5 +1,5 @@
 gapic_generator_version: 2.58.0
-googleapis_commitish: 7d43527b927f65a80de9f0071d0a2e1c172de849
+googleapis_commitish: 5c929307255b1726cdc72855ffc67014fc897d11
 libraries_bom_version: 26.60.0
 libraries:
   - api_shortname: spanner