docs(): Added missing commas to NgModule (#2325)

Author: erikhaddad

docs/install-and-setup.md

@@ -76,8 +76,8 @@ import { environment } from '../environments/environment';
 @NgModule({
   imports: [
     BrowserModule,
-    AngularFireModule.initializeApp(environment.firebase)
-    AngularFireAnalyticsModule
+    AngularFireModule.initializeApp(environment.firebase),
+    AngularFireAnalyticsModule,
     AngularFirestoreModule
   ],
   declarations: [ AppComponent ],
@@ -158,4 +158,4 @@ Finally, we can deploy the application to Firebase hosting:
 
 ```bash
 ng deploy
-```
+```