Update README.md

Author: bluebill1049

README.md

@@ -2,7 +2,7 @@
 
 [![Tweet](https://img.shields.io/twitter/url/http/shields.io.svg?style=social)](https://twitter.com/intent/tweet?text=🎚+React+Smooth+Range+Input&url=https://github.com/bluebill1049/react-smooth-range-input/) [![CircleCI](https://circleci.com/gh/bluebill1049/react-smooth-range-input.svg?style=svg)](https://circleci.com/gh/bluebill1049/react-smooth-range-input) [![Coverage Status](https://coveralls.io/repos/github/bluebill1049/react-smooth-range-input/badge.svg?branch=master)](https://coveralls.io/github/bluebill1049/react-smooth-range-input?branch=master) [![npm downloads](https://img.shields.io/npm/dm/react-smooth-range-input.svg?style=flat-square)](https://www.npmjs.com/package/react-smooth-range-input) [![npm](https://img.shields.io/npm/dt/react-smooth-range-input.svg?style=flat-square)](https://www.npmjs.com/package/react-smooth-range-input) [![npm](https://badgen.net/bundlephobia/minzip/react-smooth-range-input)](https://badgen.net/bundlephobia/minzip/react-smooth-range-input)
 
-- Butter smooth input range
+- Smooth input range
 - Beautiful animation interaction
 - Tiny size