add topic schedule

Author: myeongseok-gwon

.DS_Store

@@ -41,7 +41,7 @@ class CollaborationFramework:
 | 1 | 9/7 | ✅ |  |  |  |
 | 2 | 9/14 | ✅ |  |  |  |
 | 3 | 9/21 | ✅ |  |  |  |
-| 4 | 9/28 | ✅ |  |  |  |
+| 4 | 9/28 | ✅ |  | 권명석 |  |
 | 5 | 10/5 | ✅ |  |  |  |
 | 6 | 10/12 | ✅ |  | 조해창 |  |
 | 7 | 10/19 | ✅ |  |  |  |