fix(docs): typos

Author: davideast

docs/1-install-and-setup.md

@@ -62,7 +62,7 @@ export const firebaseConfig = {
     AngularFireModule.initializeApp(firebaseConfig)
   ],
   declarations: [ AppComponent ],
-  Bootstrap: [ AppComponent ]
+  bootstrap: [ AppComponent ]
 })
 export class MyAppModule {}