Use checkout v3

Author: o-liver

.github/workflows/push.yml

@@ -12,12 +12,12 @@ jobs:
   push:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Run CI
       run: |
         echo ${{ secrets.DOCKERHUB_PASSWORD }} | docker login -u ${{ secrets.DOCKERHUB_USER }} --password-stdin
         echo "${{ secrets.CR_PAT }}" | docker login https://ghcr.io -u ${{ secrets.CR_USER }} --password-stdin
         docker build -t ppiper/neo-cli:latest .
         docker tag ppiper/neo-cli:latest ghcr.io/sap/ppiper-neo-cli:latest
         docker push ppiper/neo-cli:latest
-        docker push ghcr.io/sap/ppiper-neo-cli:latest
+        docker push ghcr.io/sap/ppiper-neo-cli:latest