Update Tutorial-ExpressGraphQL.md (graphql#1265)

* Update Tutorial-ExpressGraphQL.md

to facilitate access localhost in one click

* Remove new link and convert existing endpoint URL to be clickable

Since we're already listing the endpoint a couple lines down, let's
just make it a proper link instead of duplicating the URL.

Co-authored-by: hwillson <[email protected]>

Author: Ruaney

src/content/graphql-js/Tutorial-ExpressGraphQL.md

@@ -50,7 +50,7 @@ You can run this GraphQL server with:
 node server.js
 ```
 
-Since we configured `graphqlHTTP` with `graphiql: true`, you can use the GraphiQL tool to manually issue GraphQL queries. If you navigate in a web browser to `http://localhost:4000/graphql`, you should see an interface that lets you enter queries. It should look like:
+Since we configured `graphqlHTTP` with `graphiql: true`, you can use the GraphiQL tool to manually issue GraphQL queries. If you navigate in a web browser to [https://localhost:4000/graphql](http://localhost:4000/graphql), you should see an interface that lets you enter queries. It should look like:
 
 ![hello world graphql example](/img/hello.png)