[CI/CD][RELEASE] Turn on changelog section

release_templates/release_clea.jinja2

@@ -335,9 +335,8 @@ Here below the user can find the link to the Software artifacts associated to th
 
 ## Changelog
 
-{#
 The changelog related to this release can be found at the following [link]({{ CHANGELOG_FILE_NAME }}).
-#}
+
 ## Known Issues
 
 {% include "known_issues.jinja2" %}