Update README.md

Author: kevin369ml

README.md

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 1. My youtube: https://www.youtube.com/c/KevinXu
 2. My Chinese weibo (微博): http://weibo.com/3983872447/profile
 3. My Chinese youku (优酷): http://i.youku.com/deeplearning101
-4. My QQ group (深度学习QQ群): 153032765
+4. My QQ group (深度学习QQ群): 153032765,  2群：462661267
+5. 深度学习&医学影像专群：499801285，本群是深度学习&医学影像专群，如有兴趣加入本群，请通过电子邮件申请。邮件内容应包含简单自我介绍和工作/研究方向等。请发送至：[email protected]
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 # Have fun!
 ![alt text](https://github.com/kevin28520/My-TensorFlow-tutorials/blob/master/01%20cats%20vs%20dogs/images/starry%20night%20dd3.jpg)