chore(ci): update github actions and docker dependencies (#368)

- Update `actions/checkout` from v3 to v4 in workflows
- Enable `allow-unsafe-pr-checkout` in `docker-build-pr.yml` to support
  PR builds with updated checkout version

.github/workflows/docker-build-pr.yml

@@ -21,9 +21,10 @@ jobs:
 
     steps:
       - name: Checkout PR code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           ref: ${{ github.event.pull_request.head.sha }}
+          allow-unsafe-pr-checkout: true
 
       - name: Set variables
         run: |