Update index.yml

explore/index.yml

@@ -2,8 +2,8 @@ banner:
 - link: https://codechina.csdn.net/courses/detail/1/l
   url: https://codechina.csdn.net/codechina/operation-work/uploads/3d1c29bc9e4003473c6f746c075722cb/Git%E5%9F%BA%E7%A1%80%E5%85%A5%E9%97%A8.jpg
 groups:
-- codechina
 - csdn
+- codechina
 - taosdata
 - apachecn
 - dcloudio