fix(system.autoUpgrade): Use correct URI

modules/auto-upgrade.nix

@@ -1,7 +1,9 @@
 { pkgs, ... }: {
-  system.autoUpgrade.enable = true;
-  system.autoUpgrade.flake = "git:git.newtype.fr/newtype/newtype-org-configurations";
-  system.autoUpgrade.flags = [ "--option" "accept-flake-config" "true" ];
+  system.autoUpgrade = {
+    enable = true;
+    flake = "git+https://git.newtype.fr/newtype/newtype-org-configurations";
+    flags = [ "--option" "accept-flake-config" "true" ];
+  };
 
   # add a random jitter so not all machines reboot at the same time.
   systemd.timers.auto-reboot.timerConfig.RandomizedDelaySec = 60 * 20;