[submodule] Update submodule linkmgrd to the latest HEAD automatically (#19843)

mssonicbld · web-flow · commit b231b4da1454 · 2024-08-08T17:38:00.000+08:00
#### Why I did it src/linkmgrd ``` * b068f02 - (HEAD -> 202305, origin/202305) [active-standby] Fix default route handler race condition (Azure#254) (2 days ago) [Longxiang Lyu] ``` #### How I did it #### How to verify it #### Description for the changelog
diff --git a/src/linkmgrd b/src/linkmgrd
@@ -1 +1 @@
-Subproject commit 7706c2c476076dc7f6f35e3d8a7957295658a53d
+Subproject commit b068f0253bb9991905629650bc70f9110540c147
