[submodule] Update submodule sonic-swss to the latest HEAD automatically (#19992)

#### Why I did it
src/sonic-swss
```
* 12c78fec - (HEAD -> 202405, origin/202405) Reduce log verbosity when the capability is not implemented (#3240) (7 hours ago) [Vivek]
```
#### How I did it
#### How to verify it
#### Description for the changelog

Author: mssonicbld