Fix PHP 7.2 incompability

Author: gziolo

tests/phpunit/tests/abilities-api/wpRegisterAbility.php

@@ -161,7 +161,7 @@ public function test_register_valid_ability(): void {
 			array(
 				'instructions' => '',
 				'idempotent'   => false,
-			),
+			)
 		);
 		$expected_meta        = array_merge(
 			self::$test_ability_args['meta'],