fix readme links (#175)

README.md

@@ -2,7 +2,7 @@
 
 !["Greetings Cosmonauts"](./hellochain/space.png)
 
-_[The code for these tutorials (and this site) can be found here on Github](https:://www.github.com/cosmos/sdk-tutorials)_
+_[The code for these tutorials (and this site) can be found here on Github](https://www.github.com/cosmos/sdk-tutorials)_
 
 **[Click here](./nameservice/tutorial/21-build-run.md)** for instructions on how to build and run the code.
 
@@ -18,6 +18,6 @@ The nameservice tutorial also has translations and a slide deck.
 
 Translations:
 
-- [中文](./README_cn.md)
+- [中文](./nameservice/README_cn.md)
 
 ## [Slides](https://docs.google.com/presentation/d/1aCMAdkVY-gfgnGNPTygwVk3o68czPQ_VYfvdMy9Ek5Q/edit?usp=sharing)