update readme shell sort

colynn · colynn · commit 250b51e8ef6a · 2020-12-07T13:44:59.000+08:00
diff --git a/README.md b/README.md
@@ -4,7 +4,7 @@
 - [x] Bubble Sort
 - [x] Insertion Sort
 - [x] Selection Sort
-- [ ] Shell Sort
+- [x] Shell Sort
 
 ## 概述
 
