nixos/forgejo: leverage systemd-notify support (#398210)

Author: adamcstephens

nixos/modules/services/misc/forgejo.nix

@@ -722,7 +722,7 @@ in
       '';
 
       serviceConfig = {
-        Type = "simple";
+        Type = "notify";
         User = cfg.user;
         Group = cfg.group;
         WorkingDirectory = cfg.stateDir;