FIX(content): missing Gitlab index file

FAQ_articles/technique/forge/fusionforge/_index.md

 +++
 title = "FusionForge"
-tags = [ "FusionForge", "Logiciel libre" ]
+tags = [ "FusionForge", "Forge", "Logiciel libre" ]
 date = "2021-08-24"
 geekdocCollapseSection = true
 +++

FAQ_articles/technique/forge/gitlab/_index.md

++++
+title = "Gitlab"
+tags = [ "Gitlab", "Forge", "Logiciel libre" ]
+date = "2021-08-24"
+geekdocCollapseSection = true
++++
+{{< toc-tree >}}