Merge pull request #1027 from apollographql/sb/fix-localhost-url

Fix an inconsistent localhost URL

Author: Stephen Barlow

docs/source/tutorial/queries.mdx

@@ -36,7 +36,7 @@ import injectStyles from './styles';
 // Initialize ApolloClient
 const client: ApolloClient<NormalizedCacheObject> = new ApolloClient({
   cache,
-  uri: 'http://localhost:4000/',
+  uri: 'http://localhost:4000/graphql',
 });
 
 injectStyles();