Merge pull request graphql#824 from yoshwata/patch-1

Update Tutorial-GraphQLClients.md

Author: orta

site/graphql-js/Tutorial-GraphQLClients.md

@@ -25,7 +25,7 @@ You should see the output returned as JSON:
 
 If you prefer to use a graphical user interface to send a test query, you can use clients such as [GraphiQL](https://github.com/graphql/graphiql) and [Insomnia](https://github.com/getinsomnia/insomnia).
 
-It's also simple to send GraphQL from the browser. Open up http://localhost:4000, open a developer console, and paste in:
+It's also simple to send GraphQL from the browser. Open up http://localhost:4000/graphql, open a developer console, and paste in:
 
 ```javascript
 fetch('/graphql', {