Fix push image and rever workflow name

Author: gudgl

.github/workflows/push.yaml

@@ -1,3 +1,4 @@
+name: Push Image
 
 on:
   push:
@@ -8,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out
-      - uses: actions/checkout@v2
+        uses: actions/checkout@v2
       - name: Docker meta
         id: meta
         uses: docker/metadata-action@v3