Audit and fix Blazor's PWA manifest (#33469)

Author: taha-ghadirian

src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Client/wwwroot/icon-192.png

@@ -5,11 +5,17 @@
   "display": "standalone",
   "background_color": "#ffffff",
   "theme_color": "#03173d",
+  "prefer_related_applications": false,
   "icons": [
     {
       "src": "icon-512.png",
       "type": "image/png",
       "sizes": "512x512"
+    },
+    {
+      "src": "icon-192.png",
+      "type": "image/png",
+      "sizes": "192x192"
     }
   ]
 }