🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Author: gcf-owl-bot[bot]

.github/workflows/response.yaml

@@ -13,7 +13,7 @@ jobs:
       issues: write
       pull-requests: write
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v4
       - uses: actions/github-script@v7
         with:
           script: |
@@ -27,7 +27,7 @@ jobs:
       issues: write
       pull-requests: write
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v4
       - uses: actions/github-script@v7
         with:
           script: |