Update index.rst
During the meeting it was clear from the Nix team that they wanted our tutorial to point to https://nix.dev.
source: https://github.com/NixOS/nix.dev/issues/284#issuecomment-1198130228
Edited by FAURE Adrien
GitLab upgrade completed. Current version is 19.2.7
https://docs.gitlab.com/releases/19/gitlab-19-2-released/
During the meeting it was clear from the Nix team that they wanted our tutorial to point to https://nix.dev.
source: https://github.com/NixOS/nix.dev/issues/284#issuecomment-1198130228