Apply suggestion to doc/user/project/clusters/serverless/index.md

doc/user/project/clusters/serverless/index.md

@@ -255,7 +255,7 @@ deploy:
 You can either import it with `include` parameter and use `extends` to
 customize your jobs, or you can inline entire template by choosing it
 from "Apply a template" dropdown when editing `.gitlab-ci.yml` file through
-the User Interface.
+the user interface.
 
 ### Deploy the application with Knative