Merge branch 'update_changelog' into 'master'

Update changelog

Fixes #146

See merge request !149

CHANGELOG-EE

@@ -2,6 +2,8 @@ v 7.2.0
   - Improve Redmine integration
   - Better logging for the JIRA issue closing service
   - Administrators can now send email to all users through the admin interface
+  - JIRA issue transition ID is now customizable
+  - LDAP group settings are now visible in admin group show page and group members page
 
 v 7.1.0
   - Synchronize LDAP-enabled GitLab administrators with an LDAP group (Marvin Frick, sponsored by SinnerSchrader)