Update 04-variable-io.md

ChronoAero · web-flow · commit ab931f23d851 · 2024-09-20T21:48:33.000+08:00
diff --git a/tutorial-0-self-learn-basic-c/04-variable-io.md b/tutorial-0-self-learn-basic-c/04-variable-io.md
@@ -205,7 +205,7 @@ Hello
 Hi
 ```
 
-> We covered the materials needed for your **Homework 2**! You can access it [here](homeworks/hw02_introduce_yourself.md). Give it a try, good luck! 
+> We covered the materials needed for your **Homework 2**! You can access it [here](homeworks/hw02-introduce-yourself.md). Give it a try, good luck! 
 
 
 ### `scanf`
