Merge pull request #3841 from EledenGreen/patch-11

Apollo Studio Explorer is now GraphOS Studio Explorer

Author: mluukkai

src/content/8/en/part8a.md

@@ -394,7 +394,7 @@ Start the server by running `node index.js` in the terminal.
 
 ### Apollo Studio Explorer
 
-When Apollo server is run in development mode the page [http://localhost:4000](http://localhost:4000) has a button <i>Query your server</i> that takes us to [Apollo Studio Explorer](https://www.apollographql.com/docs/studio/explorer/explorer/).  This is very useful for a developer, and can be used to make queries to the server.
+When Apollo server is run in development mode the page [http://localhost:4000](http://localhost:4000) has a button <i>Query your server</i> that takes us to [GraphOS Studio Explorer](https://www.apollographql.com/docs/graphos/platform/explorer).  This is very useful for a developer, and can be used to make queries to the server.
 
 Let's try it out: