Merge pull request #189711 from SuperSandro2000/gnupg-remote-quiet

nixos/gnupg: void error messages when using nix remote builders

nixos/modules/programs/gnupg.nix

···
       # The SSH agent protocol doesn't have support for changing TTYs; however we
       # can simulate this with the `exec` feature of openssh (see ssh_config(5))
       # that hooks a command to the shell currently running the ssh program.
-      Match host * exec "${cfg.package}/bin/gpg-connect-agent --quiet updatestartuptty /bye > /dev/null"
+      Match host * exec "${cfg.package}/bin/gpg-connect-agent --quiet updatestartuptty /bye >/dev/null 2>&1"
     '';
 
     environment.extraInit = mkIf cfg.agent.enableSSHSupport ''