Upload helm chart in main, not master

.gitlab-ci.yml

@@ -15,7 +15,7 @@ upload Helm Chart:
   rules:
     - if: $CI_MERGE_REQUEST_ID
       when: never
-    - if: '$CI_COMMIT_REF_SLUG =~ /(master|develop)/'
+    - if: '$CI_COMMIT_REF_SLUG =~ /(main|develop)/'
       changes:
         - helm/**/*
       when: on_success