nix-daemon service: Ensure ssh is on PATH. Fixes NixOS#46038.

This fixes a regression introduced in commit
  700e21d

nix needs ssh on path for the SSH substituter functionality,
not only the distributed builds functionality.

Signed-off-by: Niklas Hambüchen <mail@nh2.me>

nixos/modules/services/misc/nix-daemon.nix

@@ -400,8 +400,8 @@ in
     systemd.sockets.nix-daemon.wantedBy = [ "sockets.target" ];
 
     systemd.services.nix-daemon =
-      { path = [ nix pkgs.utillinux ]
-          ++ optionals cfg.distributedBuilds [ config.programs.ssh.package pkgs.gzip ]
+      { path = [ nix pkgs.utillinux config.programs.ssh.package ]
+          ++ optionals cfg.distributedBuilds [ pkgs.gzip ]
           ++ optionals (!isNix20) [ pkgs.openssl.bin ];
 
         environment = cfg.envVars