chore: Update generation configuration at Tue Aug 20 02:18:11 UTC 2024 (#2146)

Author: cloud-java-bot

generation_config.yaml

@@ -1,5 +1,5 @@
 gapic_generator_version: 2.44.0
-googleapis_commitish: 21c206f7370ed960b1c00418cb1edbdb81e3f999
+googleapis_commitish: b678386866ca6ee40c84c9043beb70992309343e
 libraries_bom_version: 26.44.0
 libraries:
   - api_shortname: pubsub