switch go version to 1.16

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

Author: jkandasa

.github/workflows/publish_images.yaml

@@ -19,6 +19,10 @@ jobs:
           username: ${{ secrets.QUAY_USERNAME }}
           password: ${{ secrets.QUAY_TOKEN }}
 
+      - uses: actions/setup-go@v2
+        with:
+          go-version: ^1.16
+
       - name: Build container and push
         run: |
           make generate