style: use multiline format for repositories list

Author: erezrokah

.github/workflows/trigger_gen.yml

@@ -16,7 +16,11 @@ jobs:
           app-id: ${{ secrets.CQ_APP_ID }}
           private-key: ${{ secrets.CQ_APP_PRIVATE_KEY }}
           permission-actions: write
-          repositories: plugin-pb-go,plugin-pb-python,plugin-pb-java,plugin-pb-javascript
+          repositories: |
+            plugin-pb-go
+            plugin-pb-python
+            plugin-pb-java
+            plugin-pb-javascript
       - name: Trigger plugin-pb-go code generation
         uses: actions/github-script@v6
         with: