[swss] Update submodule (#9723)

Why I did it
Update the sonic-swss submodule. The following are new commits in the submodule.

6dae6b8 Add initial value for weight in overlay nexthops (#2096)
d3cd402 [p4rt-tests] Bind response consumer to appl_state_db (#2105)
43e54e5 Fix armhf buildimage artifacts not found issue (#2107)

How I did it
Update the swss submodule pointer.