fix(quay.io): start using quay.io and fix backup push (#805)

.github/workflows/release-backup.yaml

@@ -20,6 +20,9 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v2
 
+      - name: Check envs
+        run: make -C backup/pvc check-env
+
       - name: Build the e2e image
         run: make -C backup/pvc docker-build-e2e
 
@@ -34,6 +37,7 @@ jobs:
 
       - name: Bump the version
         if: github.ref == 'refs/heads/master' && github.event_name != 'pull_request'
+        shell: bash
         run: make -C backup/pvc sembump && make -C backup/pvc bump-version
 
       - name: Login to Quay.io