[submodule] Update submodule sonic-host-services to the latest HEAD automatically (#21910)

#### Why I did it
src/sonic-host-services
```
* 84c7d72 - (HEAD -> master, origin/master, origin/HEAD) sonic-host-services changes for gNOI Warm Reboot (#191) (32 hours ago) [rkavitha-hcl]
```
#### How I did it
#### How to verify it
#### Description for the changelog

Author: mssonicbld