Fixed wrong links

Author: oreshinya

README.md

@@ -4,7 +4,7 @@
 
 # purescript-bucketchain
 
-[![Latest release](http://img.shields.io/github/release/oreshinya/purescript-bucketchain.svg)](https://github.com/oreshinya/purescript-bucketchain/releases)
+[![Latest release](http://img.shields.io/github/release/Bucketchain/purescript-bucketchain.svg)](https://github.com/Bucketchain/purescript-bucketchain/releases)
 
 A PureScript webserver interface based on asyncronous middlewares.