BC-5101 - go back to docker/build-push-action@v4 for push workflow

Remove lines who produce the malformed docker.config

.github/workflows/push.yml

@@ -53,8 +53,6 @@ jobs:
 
       - name: test image exists
         run: |
-          mkdir -p ~/.docker
-          echo '{"experimental": "enabled"}' >> ~/.docker/config.json
           echo "IMAGE_EXISTS=$(docker manifest inspect ghcr.io/${{ github.repository }}-${{ matrix.tenants }}:${{ needs.branch_meta.outputs.sha }} > /dev/null && echo 1 || echo 0)" >> $GITHUB_ENV
 
       - name: Set up Docker Buildx
@@ -63,7 +61,7 @@ jobs:
 
       - name: Build and push ${{ github.repository }}
         if: ${{ env.IMAGE_EXISTS == 0 }}
-        uses: docker/build-push-action@v4.1.1
+        uses: docker/build-push-action@v4
         with:
           build-args: |
             SC_THEME=${{ matrix.tenants }}