CONTRIBUTING: Add message for code of conduct

RyanSquared · RyanSquared · commit 15b31637c5a2 · 2018-03-15T08:02:25.000-05:00
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -3,6 +3,8 @@
 This document serves as contribution guidelines and the points listed should be
 followed for contributions to the foundation.
 
+Contributions are expected to follow the [code of conduct][CODE_OF_CONDUCT.md].
+
 ## Commit Guidelines
 
 As is somewhat standard practice, the following should be observed:
