Update Phonebook.Frontend/src/app/services/api/organigram.service.ts

Co-authored-by: DanielHabenicht <daniel-habenicht@outlook.de>

Author: paule96

Phonebook.Frontend/src/app/services/api/organigram.service.ts

@@ -90,7 +90,7 @@ export class UnitTreeNode {
   }
 }
 
-export class OrgUnit {
+class OrgUnit {
   public Id: number;
 
   public Name?: string;