Update README.MD

Using [email protected] I had to change the import path according to 
- https://stackoverflow.com/questions/69128608/how-to-fix-angular-fire-has-no-exported-member-angularfiremodule-ts2305
- https://firebase.google.com/docs/web/modular-upgrade

Author: szediwy

README.MD

@@ -48,8 +48,8 @@ import {AppComponent} from './app.component';
 import {firebase, firebaseui, FirebaseUIModule} from 'firebaseui-angular';
 import {environment} from '../environments/environment';
 import {AppRoutingModule} from './app-routing.module';
-import {AngularFireModule} from '@angular/fire';
-import {AngularFireAuthModule, USE_EMULATOR as USE_AUTH_EMULATOR} from '@angular/fire/auth';
+import { AngularFireModule } from "@angular/fire/compat";
+import { AngularFireAuthModule, USE_EMULATOR as USE_AUTH_EMULATOR } from "@angular/fire/compat/auth";
 
 
 const firebaseUiAuthConfig: firebaseui.auth.Config = {