[submodule] Update submodule sonic-platform-daemons to the latest HEAD automatically (#26379)

#### Why I did it
src/sonic-platform-daemons
```
* 4c7c3c9 - (HEAD -> master, origin/master, origin/HEAD) [.github]: Add PR template reference to copilot-instructions (#777) (9 hours ago) [Vasundhara Volam]
```
#### How I did it
#### How to verify it
#### Description for the changelog

Author: mssonicbld