Fix Go version

Author: adrianludwin

cloudbuild.yaml

@@ -15,7 +15,7 @@ steps:
     echo Checking out $_HNC_IMG_TAG
     git checkout $_HNC_IMG_TAG
 # Build the manifests and the kubectl plugin
-- name: golang:1.17
+- name: golang:1.20
   entrypoint: 'bash'
   args:
   - '-c'