Change default port of backend to 7007 due to MacOS Control Center update

Signed-off-by: Otto Sichert <git@ottosichert.de>

docs/auth/google/provider.md

@@ -26,7 +26,7 @@ To support Google authentication, you must create OAuth credentials:
    - `Name`: Backstage (or your custom app name)
    - `Authorized JavaScript origins`: http://localhost:3000
    - `Authorized Redirect URIs`:
-     http://localhost:7000/api/auth/google/handler/frame
+     http://localhost:7007/api/auth/google/handler/frame
 7. Click Create
 
 ## Configuration