[202012][submodule]: Advance sonic-swss

[nazariig]

Signed-off-by: Nazarii Hnydyn nazariig@nvidia.com

Why I did it

• Advanced sonic-swss to pick up LAG cleanup improvements

How I did it

• Advanced submodule

How to verify it

1. make configure PLATFORM=mellanox
2. make target/sonic-mellanox.bin

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

• 201811
• 201911
• 202006
• 202012
• 202106

Description for the changelog

Commits on Sep 18, 2021
[pfcwd] Fix the polling interval time granularity (#1912) 98a3ae8

Commits on Sep 20, 2021
[202012][teammgrd]: Improve LAGs cleanup on shutdown (#1916) 5a4678e 

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

      .---.        .-----------
     /     \  __  /    ------
    / /     \(  )/    -----
   //////   ' \/ `   ---
  //// / // :    : ---
 // /   /  /`    '--
//          //..\\
       ====UU====UU====
           '//||\\`
             ''``