[submodule] Update submodule sonic-swss to the latest HEAD automatica…

…lly (#20904)

#### Why I did it
src/sonic-swss
```
* 12ccbdf7 - (HEAD -> 202405, origin/202405) [202405][ACL]Add support for COPY action (#3338) (10 hours ago) [Devesh Pathak]
```
#### How I did it
#### How to verify it
#### Description for the changelog