ci(docker): skip login on pull requests

Author: matthewpi

.github/workflows/docker.yaml

@@ -42,6 +42,7 @@ jobs:
 
       - name: Login to GitHub Container Registry
         uses: docker/login-action@v2
+        if: "github.event_name != 'pull_request'"
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
@@ -55,7 +56,7 @@ jobs:
           sed -i "s/    'version' => 'canary',/    'version' => '${REF:1}',/" config/app.php
 
       - name: Build and Push
-        uses: docker/build-push-action@v3
+        uses: docker/build-push-action@v4
         with:
           context: .
           file: ./Dockerfile