Add missing link in changelog

Author: acelaya

CHANGELOG.md

@@ -9,7 +9,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 * *Nothing*
 
 ### Changed
-* Replace `react-datepicker` with native `input[type="date"]` and `input[type="datetime-local"]` elements.
+* [#249](https://github.com/shlinkio/shlink-web-component/issues/249) Replace `react-datepicker` with native `input[type="date"]` and `input[type="datetime-local"]` elements.
 
 ### Deprecated
 * *Nothing*