chore(deps): update actions/checkout action to v3

Author: renovate-bot

.github/workflows/verify_cla_signature_pr.yml

@@ -21,7 +21,7 @@ jobs:
         python-version: [3.8]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 100
       - name: Set up Python ${{ matrix.python-version }}