[BUG]: find/findFirst return type

[mpadinhabrandao]

I test update project from Phalcon 5.6.1 to Phalcon 5.8 but i have a fatal error with Phalcon\Mvc\Model::find. Now find function don't have return value, but um 5.6.1 has.
The change has add in https://github.com/phalcon/cphalcon/pull/16578/files. (5.6.2 -> 5.7.0), I read the reliases and don't find reference to this change :/
in this PR, remove de return type, why? 🙂

To Reproduce
When extends \Phalcon\Mvc\Model have the error

Details

• Phalcon version: 5.8.0
• PHP Version: 8.1.29
• Operating System: Rockylinux
• Installation type: by pecl
• Server: Nginx