Update submodule

Signed-off-by: Vivek Reddy Karri <vkarri@nvidia.com>

d03ba4fa [202012] [portstat, intfstat] added rates and utilization  (sonic-net#1812)
499ad3f4 [config reload] Fix config reload failure due to sonic.target job cancellation (sonic-net#1814)
96d658c2 [202012][sonic installer] Add swap setup support (sonic-net#1815)
a9c69702 platform pre-check for reboot in 202012 branch (sonic-net#1788)
0e0478ba Unify the number format in the ourput of portstat and pfcstat in all cases (sonic-net#1795)
2d1e00ed [ecnconfig] Fix exception seen during display and add unit tests (sonic-net#1784) (sonic-net#1789)