chore(deps): update dependency com.google.api:gapic-generator-java to v2.60.0

Author: renovate-bot

.github/workflows/ci.yaml

@@ -136,7 +136,7 @@ jobs:
           gcr.io/cloud-devrel-public-resources/java-library-generation:"${library_generation_image_tag}" \
           /src/library_generation/cli/entry_point.py validate-generation-config
       env:
-        library_generation_image_tag: 2.59.0
+        library_generation_image_tag: 2.60.0
         workspace_name: /workspace
 
 # TODO: Uncomment the needed Github Actions

.github/workflows/generated_files_sync.yaml

@@ -20,7 +20,7 @@ on:
   pull_request:
 name: generation diff
 env:
-  library_generation_image_tag: 2.59.0
+  library_generation_image_tag: 2.60.0
 jobs:
   root-pom:
     # root pom.xml does not have diff from generated one