add 4-4 gitlab pages guide to TOC

docs/gitlab/gitlab-tutorials.md

@@ -39,7 +39,8 @@ Follow the below tutorials (left in the navigation panel) to set up and use GitL
 ### 4. Making and publishing your repository
 - [4.1 Make a repository](../4-1-you-make-your-repo)
 - [4.2 Create a doi](../4-2-you-doi)
-- [4.3 Making your pages site](../4-3-you-make-your-pages-site)
+- [4.3 Create a GitHub Pages site](../4-3-you-make-your-pages-site)
+- [4.4 Create a GitLab Pages site](../4-4-create-gitlab-pages-site)
 
 ### 5. Managing your project on GitLab
 - [5.1 GitLab issues](../5-1-projectmanagement-issues)