[202111][submodule] Advance sonic-swss submodule (#11231)

Advance sonic-submodule to get the following fixes: 

ebdc242 Fix fbdorch to properly handle syncd FDB FLUSH Notif
8fd44da [ci] Don't publish gcov artifact when test failed
dcf6429 [ci] Change artifact reference pipeline to common lib pipeline.
387ed60 [ci] Use correct branch when downloading artifact.
169f597 [ci] Improve azp trigger settings to automaticlly support new release branch