Fix tmp file deletion in mysqli_pam_sha256_public_key_ini.phpt test

Author: mvorisek

ext/mysqli/tests/mysqli_pam_sha256_public_key_ini.phpt

@@ -120,6 +120,9 @@ mysqlnd.sha256_server_public_key="test_sha256_ini"
 	$link->query('DROP USER shatest@localhost');
 	$file = "test_sha256_ini";
 	@unlink($file);
+    if (PHP_MAJOR_VERSION === 8 && PHP_MINOR_VERSION === 1) { // fix temporary file deletion for Github Action CI for PHP 8.1
+        @unlink(__DIR__ . '/../../../' . $file);
+    }
 ?>
 --EXPECTF--
 Warning: mysqli::__construct(): (HY000/1045): %s in %s on line %d