ci: update checkout version

Author: kevinneville

.github/workflows/changelog-ci.yaml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Run Changelog CI
         uses: saadmk11/changelog-ci@v0.7.5