docs: update login url

Author: florianbussmann

pages/self-hosting/hosting-guide.mdx

@@ -69,7 +69,7 @@ When running the application for the first time, an admin account and organizati
 
 #### Login to your account 
 
-Open your browser and go to [http://localhost/login](http://localhost/login) to access the application.
+Open your browser and go to [http://localhost/login?orgslug=default](http://localhost/login?orgslug=default) to access the application.
 
 #### Change your password