install operator sdk in github action

Signed-off-by: Jeeva Kandasamy <jkandasa@gmail.com>

Author: jkandasa

.github/workflows/publish_images.yaml

@@ -22,6 +22,10 @@ jobs:
       - uses: actions/setup-go@v2
         with:
           go-version: ^1.16
+      
+      - uses: shivanshs9/setup-k8s-operator-sdk@v1
+        with:
+        version: "1.11.0"
 
       - name: Build container and push
         run: |