[submodule] Update submodule sonic-swss to the latest HEAD automatically (#17115)

#### Why I did it
src/sonic-swss
```
* 2b02c249 - (HEAD -> master, origin/master, origin/HEAD) Send hearbeat during warm reboot freese (#2923) (81 minutes ago) [Hua Liu]
```
#### How I did it
#### How to verify it
#### Description for the changelog

Author: mssonicbld