Rename 0004-median-of-two-sorted-arrays to 0004-median-of-two-sorted-arrays.md

0004-median-of-two-sorted-arrays/Article/0004-median-of-two-sorted-arrays → 0004-median-of-two-sorted-arrays/Article/0004-median-of-two-sorted-arrays.md

@@ -147,4 +147,4 @@ public class Solution {
 
 ```
 ![](../../Pictures/qrcode.jpg)
-```
+```
\ No newline at end of file