[submodule] Update submodule sonic-platform-daemons to the latest HEAD automatically (#24583)

#### Why I did it
src/sonic-platform-daemons
```
* 99a4594 - (HEAD -> master, origin/master, origin/HEAD) Enable sff_mgr for all non-cmis txvrs (#715) (2 days ago) [Ariz Zubair]
* 6ce0b7c - Xcvrd Refactor 3/13: Breakup task_worker into separate functions - 1 (#701) (6 days ago) [Bobby McGonigle]
* 10b787c - [SmartSwitch] Add graceful shutdown and startup handling in platform daemons (#703) (6 days ago) [Vasundhara Volam]
* 4a6a012 - [sff-mgr] Disable SFF manager support for all CMIS transceivers (#710) (8 days ago) [mihirpat1]
```
#### How I did it
#### How to verify it
#### Description for the changelog

Author: mssonicbld