Update angular to 20

src/app/app.config.server.ts

@@ -1,5 +1,5 @@
+import { provideServerRendering } from '@angular/ssr';
 import { mergeApplicationConfig, ApplicationConfig } from '@angular/core';
-import { provideServerRendering } from '@angular/platform-server';
 import { appConfig } from './app.config';
 
 const serverConfig: ApplicationConfig = {