Move the curl test up to error level

doc/.vale/gitlab/CurlStringsQuoted.yml

@@ -7,7 +7,7 @@
 extends: existence
 message: 'For consistency across all cURL examples, always wrap the URL in double quotes ("): %s'
 link: https://docs.gitlab.com/ee/development/documentation/restful_api_styleguide.html#curl-commands
-level: warning
+level: error
 scope: code
 raw:
   - 'curl.*[^"=]https?://.*'