Update CHANGELOG.md

PR angular-ui#1210

Author: dimirc

CHANGELOG.md

@@ -4,6 +4,7 @@ All notable changes to this project will be documented in this file.
 ## [Unreleased][unreleased]
 ### Fixed
 - Scroll to selected item [#976](https://github.com/angular-ui/ui-select/issues/976)
+- Change `autocomplete='off'` to `autocomplete='false'` [#1210](https://github.com/angular-ui/ui-select/pull/1210)
 
 ### Added
 - Can use object as source with (key,value) syntax [#1208](https://github.com/angular-ui/ui-select/pull/1208)