style: Update button styles in employee table

src/app/components/mitarbeiterverwaltung-view/mitarbeiterverwaltung-view.component.html

@@ -46,8 +46,8 @@
         <td>{{ employee.city }}</td>
         <td>{{ employee.phone }}</td>
         <td>
-          <button (click)="editEmployee(employee.id)">Edit</button>
-          <button (click)="deleteEmployee(employee.id)">Delete</button>
+          <button class="btn btn-primary me-2" (click)="editEmployee(employee.id)">Edit</button>
+          <button class="btn btn-danger" (click)="deleteEmployee(employee.id)">Delete</button>
         </td>
       </tr>
       }