Update README.md
Add link to repo code of conduct.
@@ -99,5 +99,5 @@ The nanoFramework Interpreter is licensed under the [Apache 2.0 license](http://
## Code of Conduct
-This project has adopted the code of conduct defined by the [Contributor Covenant](http://contributor-covenant.org/)
+This project has adopted the code of conduct defined by the [Contributor Covenant](CODE_OF_CONDUCT.md)
to clarify expected behavior in our community.
