[202012] [Submodule] Update sonic-swss

[prsunny]

Why I did it

Update commits:

c161027 - 2023-04-07 : [202012] overlay_dmac change in Vnet configuration. (#2724) [siqbal1986]
50be4e3 - 2023-04-05 : [202012][mux]: Implement rollback for failed mux switchovers (#2716) [Lawrence Lee]
637e4c7 - 2023-03-30 : [202012] Fix orchagent missing request when logrotate happens (#2718) [Prince Sunny]

How I did it

How to verify it

Which release branch to backport (provide reason below if selected)

• 201811
• 201911
• 202006
• 202012
• 202106
• 202111
• 202205
• 202211

Description for the changelog

Ensure to add label/tag for the feature raised. example - PR#2174 under sonic-utilities repo. where, Generic Config and Update feature has been labelled as GCU.

Link to config_db schema for YANG module changes

A picture of a cute animal (not mandatory but encouraged)