Simplify error message formatting in checkout component.

Removed the HTTP status code from the error message to provide a clearer and more user-friendly message. This change maintains focus on the error details and improves readability of the error notifications for end-users.

archigator/src/app/checkout/checkout.component.ts

@@ -219,7 +219,7 @@ export class CheckoutComponent implements OnInit {
 
           const errDetail = error.error?.detail || 'An error occurred';
 
-          this.errorMessage = `Error ${error.status}: ${errDetail}`;
+          this.errorMessage = `${errDetail}`;
 
           this.spinLoader = false;
         }