[submodule] Update submodule linkmgrd to the latest HEAD automatically

mssonicbld · mssonicbld · commit bffa8976dfe3 · 2024-07-11T03:01:57.000Z
diff --git a/src/linkmgrd b/src/linkmgrd
@@ -1 +1 @@
-Subproject commit 9768268cf11cdfab1eccb194c0ce762e372aa536
+Subproject commit 2b7e4f975ff0f2a5d6cd77282e74490928db8000
