[submodule] Update submodule sonic-swss to the latest HEAD automatically (#24403)

#### Why I did it
src/sonic-swss
```
* dfc34a13 - (HEAD -> 202505, origin/202505) [vs]: Remove non-default objects on dynamic buffer model teardown (#3965) (2 days ago) [mssonicbld]
```
#### How I did it
#### How to verify it
#### Description for the changelog

Author: mssonicbld