Fix incorrect version numbers

Author: sachilles

Changelog.md

@@ -3,8 +3,8 @@
 This file only reflects the changes that are made in this image. Please refer to the upstream GitLab [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-foss/blob/master/CHANGELOG.md) for the list of changes in GitLab.
 
 **14.7.3**
-- gitlab: upgrade CE to v14.7.2
-- gitaly: upgrade to v14.7.2
+- gitlab: upgrade CE to v14.7.3
+- gitaly: upgrade to v14.7.3
 - golang: upgrade to v1.17.7
 
 **14.7.2**