fix(markdown): Incorrect signature for point add/setCircle

markdown/dev/reference/api/point/addcircle/en.md

@@ -10,7 +10,7 @@ will call `Point.attr()` as circles are added by setting attributes. Refer to
 
 ```js
 Point point.addCircle(
-  string text, 
+  number radius, 
   string className
 )
 ```

markdown/dev/reference/api/point/setcircle/en.md

@@ -16,7 +16,7 @@ how circles are handled.
 
 ```js
 Point point.setCircle(
-  string text, 
+  number radius, 
   string className
 )
 ```