The last argument of the method is not highlighted

## About

- The highlighting of the last argument of the method is something wrong

```php
class Foo
{
// 'DateTime' is not highlighting
public function test(DateTime $a): array
{
return [$a];
}
}
```

## Screenshot

## versions

```lisp
(php-mode-version)
"PHP Mode v1.24.3-non-vcs"
```

```lisp
(emacs-version)
"GNU Emacs 30.0.50 (build 1, x86_64-apple-darwin22.4.0, NS appkit-2299.50 Version 13.3.1 (Build 22E261))
of 2023-04-26"
```