[submodule] Update submodule sonic-swss to the latest HEAD automatically (sonic-net#21387)

#### Why I did it
src/sonic-swss
```
* 4ff8153a - (HEAD -> master, origin/master, origin/HEAD) Add a delay between killing teamd processes (sonic-net#3325) (7 hours ago) [Saikrishna Arcot]
```
#### How I did it
#### How to verify it
#### Description for the changelog

Author: mssonicbld