Fix heading level

Author: wincent

site/code/index.html.js

@@ -139,7 +139,7 @@ Code that executes a hello world GraphQL query with \`graphql-clj\`:
 
 See [the documentation](https://grails.github.io/gorm-graphql/latest/guide/index.html) for more information.
 
-### [GQL](https://grooviter.github.io/gql/) 
+#### [GQL](https://grooviter.github.io/gql/) 
 
 GQL is a Groovy library for GraphQL