flake: bump inputs

My tandoor-recipes fix was merged upstream, so remove the overlay.

And because of the recent postgres bump for 23.11, `ensureDBOwnership`
is the new way of dealing with DB permissions [1]. This means I had to
fix manually migrate my `gitea` DB and make it match the DB user.

[1]: https://github.com/NixOS/nixpkgs/pull/266270

modules/nixos/services/gitea/default.nix

@@ -65,6 +65,7 @@ in
         database = {
           type = "postgres"; # Automatic setup
           user = "git"; # User needs to be the same as gitea user
+          name = "git"; # Name must be the same as user for `ensureDBOwnership`
         };
 
         # NixOS module uses `gitea dump` to backup repositories and the database,