Merge pull request jwasham#205 from keepgoing147/master

fix typo: Unxi => Unix

Author: jwasham

translations/README-cn.md

@@ -1174,7 +1174,7 @@
 
 - [ ] C++ Primer Plus, 6th Edition
 
-- [ ] [《Unxi 环境高级编程》 The Unix Programming Environment](http://product.half.ebay.com/The-UNIX-Programming-Environment-by-Brian-W-Kernighan-and-Rob-Pike-1983-Other/54385&tg=info)
+- [ ] [《Unix 环境高级编程》 The Unix Programming Environment](http://product.half.ebay.com/The-UNIX-Programming-Environment-by-Brian-W-Kernighan-and-Rob-Pike-1983-Other/54385&tg=info)
 
 - [ ] [《编程珠玑》 Programming Pearls](http://www.amazon.com/Programming-Pearls-2nd-Jon-Bentley/dp/0201657880)