Remove redundant word

[ci skip]

doc/gitlab-basics/README.md

@@ -4,7 +4,7 @@ Step-by-step guides on the basics of working with Git and GitLab.
 
 - [Start using Git on the command line](start-using-git.md)
 - [Create and add your SSH Keys](create-your-ssh-keys.md)
-- [Command Line basic commands](command-line-commands.md)
+- [Command Line basics](command-line-commands.md)
 - [Create a project](create-project.md)
 - [Create a group](create-group.md)
 - [Create a branch](create-branch.md)