github: Replaces Wiki link

.github/CONTRIBUTING.md

@@ -2,15 +2,15 @@
 
 Before you do a feature request please check and make sure that it isn't possible
 through some other means. The JavaScript enabled console is a powerful feature
-in the right hands. Please check our [Bitchin' tricks](https://github.com/NiluPlatform/go-nilu/wiki/bitchin-tricks) wiki page for more info
+in the right hands. Please check our [Wiki page](https://github.com/ethereum/go-ethereum/wiki) for more info
 and help.
 
 ## Contributing
 
-If you'd like to contribute to go-nilu please fork, fix, commit and
+If you'd like to contribute to go-ethereum please fork, fix, commit and
 send a pull request. Commits which do not comply with the coding standards
 are ignored (use gofmt!).
 
-See [Developers' Guide](https://github.com/NiluPlatform/go-nilu/wiki/Developers'-Guide)
+See [Developers' Guide](https://github.com/ethereum/go-ethereum/wiki/Developers'-Guide)
 for more details on configuring your environment, testing, and
 dependency management.