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

…omatically (#15507)

#### Why I did it
src/sonic-swss-common
```
* 2320ddc - (HEAD -> master, origin/master, origin/HEAD) Add ZMQ port for orchagent (#795) (19 hours ago) [Hua Liu]
```
#### How I did it
#### How to verify it
#### Description for the changelog