Update CHANGELOG.md [CI skip]

CHANGELOG.md

@@ -6,8 +6,8 @@ omnibus-gitlab repository.
 10.8.0
 - Upgrade Ruby version to 2.3.7
-- Bump git to 2.16.3
 - Add Prometheus Alertmanager
+- Bump git to 2.16.3
 10.7.0
@@ -79,7 +79,6 @@ omnibus-gitlab repository.
 10.5.5
 - Resolve "consul service postgresql_service failing on db host - no access to /opt/gitlab/embedded/node
-- Add Prometheus Alertmanager
 10.5.4