Move items to the correct version in the changelog.

CHANGELOG

@@ -20,7 +20,11 @@ v 7.9.0 (unreleased)
   - Add brakeman (security scanner for Ruby on Rails)
   - Slack username and channel options
   - Add grouped milestones from all projects to dashboard.
-  - Web hook sends pusher email as well as commiter 
+  - Web hook sends pusher email as well as commiter
+  - Add Bitbucket omniauth provider.
+  - Add Bitbucket importer.
+  - Support referencing issues to a project whose name starts with a digit
+
 v 7.8.2
   - Fix service migration issue when upgrading from versions prior to 7.3
   - Fix setting of the default use project limit via admin UI
@@ -35,9 +39,6 @@ v 7.8.1
   - Fix the warning for LDAP users about need to set password
   - Fix avatars which were not shown for non logged in users
   - Fix urls for the issues when relative url was enabled
-  - Add Bitbucket omniauth provider.
-  - Add Bitbucket importer.
-  - Support referencing issues to a project whose name starts with a digit
 
 v 7.8.0
   - Fix access control and protection against XSS for note attachments and other uploads.