fix: use master or main for production env

templates/gitlab-ci-helm.yml

@@ -76,7 +76,7 @@ variables:
   HELM_REVIEW_ENVIRONMENT_SCHEME: "https"
 
   # default production ref name (pattern)
-  PROD_REF: '/^master$/'
+  PROD_REF: '/^(master|main)$/'
   # default integration ref name (pattern)
   INTEG_REF: '/^develop$/'