Update docs/index.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: Zecyel

docs/index.md

@@ -14,7 +14,7 @@ next: false
 * **Sep. 23, 2025** [Lab0: GitLab](/lab/lab0)发布
 * **Sep. 30, 2025** [Lab1: DataLab](/lab/lab1)发布
 * **Oct. 14, 2025** [Lab2: BombLab](/lab/lab2)发布
-* **Oct. 28, 2025** [Lab2: BombLab](/lab/lab3)发布
+* **Oct. 28, 2025** [Lab3: FlowLab](/lab/lab3)发布
 
 ## 🔍 Just for Fun