Tests: Restore restapi group on WP_Test_REST_Revisions_Controller.

See #40510.

git-svn-id: https://develop.svn.wordpress.org/trunk@43647 602fd350-edb4-49c9-b593-d223f7449a82

Author: SergeyBiryukov

tests/phpunit/tests/rest-api/rest-revisions-controller.php

@@ -7,7 +7,7 @@
  */
 
 /**
- * @group restapi-revisions
+ * @group restapi
  */
 class WP_Test_REST_Revisions_Controller extends WP_Test_REST_Controller_Testcase {
 	protected static $post_id;