Adding id to manifest.jsons (#45269)

src/ProjectTemplates/Web.ProjectTemplates/content/ComponentsWebAssembly-CSharp/Client/wwwroot/manifest.json

@@ -1,6 +1,7 @@
 {
   "name": "ComponentsWebAssembly-CSharp",
   "short_name": "ComponentsWebAssembly-CSharp",
+  "id": "./",
   "start_url": "./",
   "display": "standalone",
   "background_color": "#ffffff",

src/ProjectTemplates/Web.ProjectTemplates/content/EmptyComponentsWebAssembly-CSharp/Client/wwwroot/manifest.json

@@ -1,6 +1,7 @@
 {
   "name": "EmptyComponentsWebAssembly-CSharp",
   "short_name": "EmptyComponentsWebAssembly-CSharp",
+  "id": "./",
   "start_url": "./",
   "display": "standalone",
   "background_color": "#ffffff",