update readme.md

Author: wan-dl

README.md

@@ -4,10 +4,21 @@
 
 当然，您也可是通过快捷键触发，默认快捷键如下：
 
-```
+```json
 {
     "command": "extension.commentPattern",
     "key": "Ctrl+Shift+/",
     "macosx": "command+Shift+/"
 }
+```
+
+## 自定义快捷键
+
+HBuilderX 菜单【工具】【自定义快捷键】，可以自定义图案注释快捷键:
+
+```json
+{
+    "key": "",
+    "command": "extension.commentPattern"
+}
 ```