Update zpp test expectations for php 8. (nikic#182)

PHP 8 refers to arguments as "argument". This changed recently.
PHP 7 refers to arguments as "parameter".

Author: TysonAndre

tests/zpp_errors.phpt

@@ -13,8 +13,8 @@ try { ast\kind_uses_flags(); }
 catch (TypeError $e) { echo $e->getMessage(), "\n"; }
 
 ?>
---EXPECT--
-ast\parse_code() expects at least 1 parameter, 0 given
-ast\parse_file() expects at least 1 parameter, 0 given
-ast\get_kind_name() expects exactly 1 parameter, 0 given
-ast\kind_uses_flags() expects exactly 1 parameter, 0 given
+--EXPECTF--
+ast\parse_code() expects at least 1 %s, 0 given
+ast\parse_file() expects at least 1 %s, 0 given
+ast\get_kind_name() expects exactly 1 %s, 0 given
+ast\kind_uses_flags() expects exactly 1 %s, 0 given