fix(@nguniversal/builders): fix development mode ignored stdout message

(cherry picked from commit 9808791)

Author: alan-agius4

modules/builders/src/ssr-dev-server/index.ts

@@ -46,7 +46,7 @@ import { getAvailablePort, spawnAsObservable, waitUntilServerIsListening } from
 /** Log messages to ignore and not rely to the logger */
 const IGNORED_STDOUT_MESSAGES = [
   'server listening on',
-  'Angular is running in the development mode. Call enableProdMode() to enable the production mode.'
+  'Angular is running in development mode. Call enableProdMode() to enable production mode.'
 ];