removed unreleased link in changelog

Author: uolter

CHANGELOG.md

@@ -3,9 +3,6 @@
 All notable changes to this project will be documented in this file. Dates are displayed in UTC.
 
 Generated by [`auto-changelog`](https://github.com/CookPete/auto-changelog).
-
-#### [Unreleased](https://github.com/pagopa/io-infrastructure-modules-new/compare/v4.0.0...HEAD)
-
 ### [v4.0.0](https://github.com/pagopa/io-infrastructure-modules-new/compare/v3.0.19...v4.0.0)
 
 > 26 November 2021