Update CONTRIBUTING.md

TwoTenPvP · web-flow · commit 891f3cff24c0 · 2019-03-20T20:06:50.000+01:00
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -37,6 +37,8 @@ The footer should contain a [closing reference to an issue](https://help.github.
 If the change isn't backwards compatible. You have to disclose that in the footer like this. Here is an example:
 ```
 perf(networked-vars): Improved performance by removing duplex functionality
+
+BREAKING CHANGE: Removes duplex functionality from networked vars in order to improve performance
 ```
 Samples:
 
