sshd.nix: Ensure global config goes before user Match blocks

Hopefully fixes #13393.

Changed files
+1 -1
nixos
modules
services
networking
ssh
+1 -1
nixos/modules/services/networking/ssh/sshd.nix
···
services.openssh.authorizedKeysFiles =
[ ".ssh/authorized_keys" ".ssh/authorized_keys2" "/etc/ssh/authorized_keys.d/%u" ];
-
services.openssh.extraConfig =
+
services.openssh.extraConfig = mkOrder 0
''
PidFile /run/sshd.pid