fix date format

thanhnguyen-aws · thanhnguyen-aws · commit e9d20ef08821 · 2025-03-14T08:29:41.000-07:00
diff --git a/doc/src/challenges/0023-vec-pt1.md b/doc/src/challenges/0023-vec-pt1.md
@@ -2,8 +2,8 @@
 
 - **Status:** Open
 - **Tracking Issue:** [#29](https://github.com/model-checking/verify-rust-std/issues/29)
-- **Start date:** *2025/03/07*
-- **End date:** *2025/10/17*
+- **Start date:** *2025-03-07*
+- **End date:** *2025-10-17*
 - **Reward:** *?*
 
 -------------------
