Added note about config (home-assistant#4292)

DubhAd · fabaff · commit 2e75312ad4a8 · 2017-12-28T21:20:48.000+01:00
A few people have got lost by not adding the config (since it isn't explicit when you need it by). Added a new step 8 to point out that you have to have it in by now or you can't continue.
diff --git a/source/_components/google_assistant.markdown b/source/_components/google_assistant.markdown
@@ -129,6 +129,7 @@ Entity Customization Keys:
 	4. Configure your client. Add scopes for `email` and `name`
 	5. Testing instructions: doesn't matter since you won't submit this app
 7. Back on the main app draft page. Click `Test Draft`. That will take you to the simulator (which won't work) so just close that window.
+8. If you haven't already added the configuration to `configuration.yaml` and restarted Home Assistant, you'll be unable to continue until you have.
 8. Open the Google Assistant app and go into `Settings > Home Control`
 9. Click the `+` sign, and near the bottom, you should have `[test] your app name`. Selecting that should lead to you the screen where you can set rooms for your devices or nicknames for your devices.
 10. If you want to allow other houshold users to control the devices:
