fix helm upgrade command

.gitlab-ci.yml

@@ -50,6 +50,6 @@ deploy:
     - curl -o /usr/bin/kubectl -LO https://storage.googleapis.com/kubernetes-release/release/`curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt`/bin/linux/amd64/kubectl
     - chmod +x /usr/bin/kubectl
     - curl https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3 | bash
-    - helm install --upgrade $DEPLOY ./helm --set image=$CI_REGISTRY_IMAGE --set tag=$CI_COMMIT_TAG
+    - helm upgrade --install $DEPLOY ./helm --set image=$CI_REGISTRY_IMAGE --set tag=$CI_COMMIT_TAG
     - POD=$(./kubectl get pods --selector=app=$DEPLOY --output=jsonpath='{.items[*].metadata.name}')
     - ./kubectl exec $POD -- python manage.py migrate