[submodule] Update submodule linkmgrd to the latest HEAD automatically (

#14746)

src/linkmgrd

* aa1d55f - (HEAD -> 202205, origin/202205) [202205] cherry-pick `azure-pipeline.yml` updates (#200) (8 hours ago) [Jing Zhang]
* 2efc130 - Enable debug symbols (#199) (9 hours ago) [Longxiang Lyu]