docs: update CHANGELOG.md

CHANGELOG.md

@@ -7,13 +7,12 @@
 * Bitmap.setImage need set width&height ([7806046](https://github.com/hiloteam/hilo/commit/7806046))
 * eventMixin.on once bug ([fcaebfd](https://github.com/hiloteam/hilo/commit/fcaebfd))
 * Hilo.getElementRect bug ([d1dda4a](https://github.com/hiloteam/hilo/commit/d1dda4a))
-* Hilo.getElementRect bug ([ead92ae](https://github.com/hiloteam/hilo/commit/ead92ae))
 * set DOMElement pointer-event style to visible when it's pointerEnabled is true ([fa28684](https://github.com/hiloteam/hilo/commit/fa28684))
 * Text.js len & wlen are used before there were defined ([7268ea4](https://github.com/hiloteam/hilo/commit/7268ea4))
 
 
 ### Features
-
+* add English api doc.
 * change WebGLRenderer.isSupport() to WebGLRenderer.isSupported ([f9f9bc4](https://github.com/hiloteam/hilo/commit/f9f9bc4))