Escape ampersand in doc text for config:status (#4828)

Escape the ampersand in the documentation text for config:status.
#4827

src/Drupal/Commands/config/ConfigCommands.php

@@ -293,7 +293,7 @@ public function delete($config_name, $key = null)
      *   Display all content types that would be created in active storage on configuration import.
      * @usage drush config:status --state=Any --format=list
      *   List all config names.
-     * @usage drush config:status 2>&1 | grep "No differences"
+     * @usage drush config:status 2>&1 | grep "No differences"
      *   Check there are no differences between database and exported config. Useful for CI.
      * @field-labels
      *   name: Name