[submodule] Update submodule linkmgrd to the latest HEAD automatically

mssonicbld · mssonicbld · commit bc9bd2dd57e5 · 2023-12-18T03:02:12.000Z
diff --git a/src/linkmgrd b/src/linkmgrd
@@ -1 +1 @@
-Subproject commit d7ab3644f578cf589a863eebab184411c640e8d1
+Subproject commit 6fa4adbce82fa0a5ad49c97b2da56373de85997b
