change template file reference

.gitlab-ci.yml

 include:
   - project: '${HELPERS_PATH}'
-    file:
-      - cicd-template.yml
-      - go-template.yml
+    file: 'cicd-template.yml'
+    ref: main
+  - project: '${HELPERS_PATH}'
+    file: 'go-template.yml'
+    ref: main
+
 
 variables:
   RUNNER_TAG: amd64-docker