nixos/direnv: fix typo

Changed files
+1 -1
nixos
modules
programs
+1 -1
nixos/modules/programs/direnv.nix
···
};
imports = [
-
(lib.mkRemovedOptionModule ["programs" "direnv" "persistDerivations"] "persistDerivations was removed as it is on longer necessary")
+
(lib.mkRemovedOptionModule ["programs" "direnv" "persistDerivations"] "persistDerivations was removed as it is no longer necessary")
];
config = lib.mkIf cfg.enable {