[submodule] Update submodule linkmgrd to the latest HEAD automatically (#17731)

#### Why I did it
src/linkmgrd
```
* 2f5971f - (HEAD -> 202305, origin/202305) [warmboot] use config_db connector to update mux mode config instead of CLI (#223) (4 hours ago) [Jing Zhang]
```
#### How I did it
#### How to verify it
#### Description for the changelog
This commit is contained in:
mssonicbld 2024-01-10 16:34:10 +08:00 committed by GitHub
parent a3b5ea93eb
commit f4c15b8322
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@ -1 +1 @@
Subproject commit 2089ab69d71621b06a0b8e7d1e710659743bcb64
Subproject commit 2f5971feb3b4acb1e76c7a3fec00e4a358bfc8cc