Use static closure

Co-authored-by: Mukesh Panchal <[email protected]>

Author: 2 people

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

@@ -3118,7 +3118,7 @@ public function test_edit_image_wp_slash_with_object_cast() {
 		// Mock wp_insert_attachment to capture the data being passed.
 		add_filter(
 			'wp_insert_attachment_data',
-			function ( $data ) use ( &$captured_data ) {
+			static function ( $data ) use ( &$captured_data ) {
 				$captured_data = $data;
 				return $data;
 			},