Fixed Import Bare Repositories instructions to match rake task.

doc/raketasks/maintenance.md

@@ -122,7 +122,7 @@ Notes:
 How to use:
-1. copy your bare repos under git base_path (see `config/gitlab.yml` git_host -> base_path)
+1. copy your bare repos under git repos_path (see `config/gitlab.yml` gitlab_shell -> repos_path)
 2. run the command below
 ```