Merge branch 'move-logs-doc-to-administration' into 'master'

Change logs.md location in README

## What does this MR do?

Forgotten link from https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/4622

See merge request !4623

doc/README.md

@@ -28,7 +28,7 @@
 - [Integration](integration/README.md) How to integrate with systems such as JIRA, Redmine, Twitter.
 - [Issue closing](customization/issue_closing.md) Customize how to close an issue from commit messages.
 - [Libravatar](customization/libravatar.md) Use Libravatar for user avatars.
-- [Log system](logs/logs.md) Log system.
+- [Log system](administration/logs.md) Log system.
 - [Environment Variables](administration/environment_variables.md) to configure GitLab.
 - [Operations](operations/README.md) Keeping GitLab up and running
 - [Raketasks](raketasks/README.md) Backups, maintenance, automatic webhook setup and the importing of projects.