Update cloudbuild.yaml

Update image tag

Author: wlan0

Diff for: cloudbuild.yaml

@@ -2,13 +2,20 @@
 timeout: 3000s
 substitutions:
   _IMAGE_NAME: 'gcr.io/k8s-staging-sig-storage/objectstorage-controller'
-  _IMAGE_TAG: 'canary'
+  _GIT_TAG: '12345'
+  _PULL_BASE_REF: 'master'
 options:
   substitution_option: ALLOW_LOOSE
 steps:
 - name: "gcr.io/k8s-testimages/gcb-docker-gcloud:v20220617-174ad91c3a"
   entrypoint: make
   args: ['build']
+  env: 
+  - GIT_TAG=${_GIT_TAG}
+  - PULL_BASE_REF=${_PULL_BASE_REF}
 - name: "gcr.io/k8s-testimages/gcb-docker-gcloud:v20220617-174ad91c3a"
   entrypoint: make
-  args: ['push']
+  args: ['push']
+  env: 
+  - GIT_TAG=${_GIT_TAG}
+  - PULL_BASE_REF=${_PULL_BASE_REF}