Merge pull request #223 from neo4j/mjfwebb-patch-2

5.x Update indexes-and-constraints.adoc

Author: mjfwebb

modules/ROOT/pages/directives/indexes-and-constraints.adoc

@@ -378,7 +378,7 @@ Requires credentials for the plugin.
 Ensure your provider credentials are set in the call to Neo4jGraphQL, for example:
 
 .Feature configuration
-[source, graphql]
+[source, javascript]
 ----
 const neoSchema = new Neo4jGraphQL({
     typeDefs,