Update contact email

Author: snaik

README.md

@@ -18,7 +18,7 @@ These steps have been tested out thoroughly on OSX Mojave 10.14.5 and Vanilla Ub
 0chain/gosdk has heavy dependency on [BLS](https://github.com/herumi/bls) and [MCL](https://github.com/herumi/mcl) 
 provided by [MITSUNARI Shigeo](https://github.com/herumi). Developers should refer to those links when they encounter any errors. 
 
-Please send email to [alphanet@chain.net](mailto:[email protected]) if you encounter any problems.
+Please send email to [alphanet@0chain.net](mailto:[email protected]) if you encounter any problems.
 
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