Fix type of region provider

Author: pjcdawkins

src/Model/Region.php

@@ -12,7 +12,7 @@
  * @property-read bool   $available
  * @property-read bool   $private
  * @property-read string $zone
- * @property-read string $provider
+ * @property-read array{name: string} $provider
  * @property-read string $endpoint
  */
 class Region extends ApiResourceBase