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 17.10.3. We now benefit from the enhancements of 17.9 and 17.10 releases. Among other improvements, it is now possible to set the automatic deletion of continuous integration pipelines. You can help us reduce storage usage by setting an expiry date for your pipelines.
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