refactor(http): deprecated symbol used (#44985)

Support for passing an error value to "throwError" method will be removed in v8 of rxjs. More info at https://rxjs.dev/api/index/function/throwError#throwerror

PR Close #44985

aio/content/examples/http/src/app/config/config.component.ts

@@ -69,7 +69,7 @@ export class ConfigComponent {
   }
 // #enddocregion showConfigResponse
   makeError() {
-    this.configService.makeIntentionalError().subscribe(null, error => this.error = error );
+    this.configService.makeIntentionalError().subscribe(null, error => this.error = error.message );
   }
 
   getType(val: any): string {

aio/content/examples/http/src/app/config/config.service.ts

@@ -82,8 +82,7 @@ export class ConfigService {
         `Backend returned code ${error.status}, body was: `, error.error);
     }
     // Return an observable with a user-facing error message.
-    return throwError(
-      'Something bad happened; please try again later.');
+    return throwError(() => new Error('Something bad happened; please try again later.'));
   }
   // #enddocregion handleError