ci: update angular to version 12

src/polyfills-test.ts

@@ -1,2 +1,2 @@
 import 'core-js/es/reflect';
-import 'zone.js/dist/zone';
+import 'zone.js';

src/polyfills.ts

@@ -55,7 +55,7 @@
 /***************************************************************************************************
  * Zone JS is required by default for Angular itself.
  */
-import 'zone.js/dist/zone';  // Included with Angular CLI.
+import 'zone.js';  // Included with Angular CLI.
 
 
 /***************************************************************************************************