Use new style of config sync directory specification

Per https://www.drupal.org/node/3018145

Thanks wolcen!

Ref #109

web/sites/default/settings.ddev.php

@@ -57,11 +57,6 @@ $config['image.settings']['suppress_itok_output'] = TRUE;
 $config['image.settings']['allow_insecure_derivatives'] = TRUE;
 
 
-// This specifies the default configuration sync directory.
-if (empty($config_directories[CONFIG_SYNC_DIRECTORY])) {
-  $config_directories[CONFIG_SYNC_DIRECTORY] = '../config/sync';
-}
-
 /**
  * Load services definition file.
  */

web/sites/default/settings.php

@@ -4,6 +4,8 @@ $settings['locale_custom_strings_en'][] = [
   'Sticky at top of lists'      => 'Feature on front page',
 ];
 
+$settings['config_sync_directory'] = '../config/sync';
+
 
 // #ddev-generated: Automatically generated Drupal settings file.
 if (file_exists($app_root . '/' . $site_path . '/settings.ddev.php')) {