Merge pull request graphql#1061 from puradox/master

docs: Fix possible typo

Author: wincent

src/type/definition.js

@@ -1202,8 +1202,8 @@ export type GraphQLInputFieldMap =
  * const PersonType = new GraphQLObjectType({
  * name: 'Person',
  * fields: () => ({
- * parents: { type: new GraphQLList(Person) },
- * children: { type: new GraphQLList(Person) },
+ * parents: { type: new GraphQLList(PersonType) },
+ * children: { type: new GraphQLList(PersonType) },
  * })
  * })
  *