zoxide: clarify options option

The value of the option `programs.zoxide.options` is passed to `zoxide
init` at shell initialization time, not to the command itself when
it's called by the user from their shell. This change makes that a
little bit clearer in the documentation.

modules/programs/zoxide.nix

@@ -28,7 +28,7 @@ in {
       default = [ ];
       example = [ "--no-cmd" ];
       description = ''
-        List of options to pass to zoxide.
+        List of options to pass to zoxide init.
       '';
     };