Add study notes for 2025-08-21

Author: AutoBot42

Turbo-Yu.md

@@ -15,6 +15,11 @@ timezone: UTC+8
 ## Notes
 
 <!-- Content_START -->
+# 2025-08-21
+
+### 21：00
+继续优化课程列表和添加课程
+
 # 2025-08-19
 
 ## 18:00