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README.md

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 * [简介](https://github.com/paddlepaddle/paddlehub#%E7%AE%80%E4%BB%8B)
 * [环境依赖](https://github.com/paddlepaddle/paddlehub#%E7%8E%AF%E5%A2%83%E4%BE%9D%E8%B5%96)
 * [安装](https://github.com/paddlepaddle/paddlehub#%E5%AE%89%E8%A3%85)
-* [快速体验](https://github.com/paddlepaddle/paddlehub#%E5%BF%AB%E9%80%9F%E4%BD%93%E9%AA%8C)F
+* [快速体验](https://github.com/paddlepaddle/paddlehub#%E5%BF%AB%E9%80%9F%E4%BD%93%E9%AA%8C)
 * [教程](https://github.com/paddlepaddle/paddlehub#%E6%95%99%E7%A8%8B)
 * [FAQ](https://github.com/paddlepaddle/paddlehub#faq)
 * [用户交流群](https://github.com/paddlepaddle/paddlehub#%E7%94%A8%E6%88%B7%E4%BA%A4%E6%B5%81%E7%BE%A4)