Update changelog

Author: ryanvog

src/ResourceManager/DevTestLabs/ChangeLog.md

@@ -18,7 +18,7 @@
         - Additional information about change #1
 -->
 ## Current Release
-
+* Update cmdlets to work with current and updated DevTest Lasbs API version.
 ## Version 3.0.0
 
 ## Version 2.8.0