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 17.11.1. We now benefit from the features of the release 17.11.
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