OZG-6958 change data-test-id for message field

alfa-client/apps/alfa-e2e/src/components/vorgang/vorgang-zusammenarbeit.e2e.component.ts

@@ -4,7 +4,7 @@ export class VorgangZusammenarbeitE2EComponent {
   private readonly anfrageButton: string = 'anfrage-erstellen-button';
   private readonly zustaendigeStelleButton: string = 'organisations-einheit-search-button';
   private readonly titelText: string = 'Titel-text-input';
-  private readonly messageText: string = 'Nachricht-textarea';
+  private readonly messageText: string = 'Beschreibung-textarea';
   private readonly sendButton: string = 'collaboration-request-submit-button';
   private readonly cancelButton: string = 'collaboration-request-cancel-button';
   private readonly searchText: string = 'instant_search-text-input';