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
Prochaines maintenances programmées: lundi 03/06, lundi 01/07, lundi 05/08
Pour plus d'informations: https://doc-si.inria.fr/display/SU/Gitlab
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