Update release notes

Author: bryaningl3

docs/content/releases/5.18.0.md

@@ -1,6 +1,6 @@
 **New Features**
 
-* 
+* Updated the ```Profile``` class to use the ```cmdtyView``` formatter by default. This formatter uses special tick notations for options on treasury futures (```ZB```, ```ZT```, ```ZF```, ```ZN``` roots), overriding the default tick notation specified in ```UnitCode``` rules.
 
 **Other**