Add triage permission for @benson0715

### Full Name

Benson Huang

### GitHub Username

@benson0715 

### Organization

_No response_

### Supporting Documents

@benson0715  has contributed the following [PRs](https://github.com/zephyrproject-rtos/zephyr/issues?q=state%3Aclosed%20label%3A%22platform%3A%20Realtek%20EC%22%20author%3Abenson0715)