[submodule] [202012] Update sonic-utilities pointer

* d03ba4f [202012] [portstat, intfstat] added rates and utilization  (#1812)
* 499ad3f [config reload] Fix config reload failure due to sonic.target job cancellation (#1814)
* 96d658c [202012][sonic installer] Add swap setup support (#1815)
* a9c6970 platform pre-check for reboot in 202012 branch (#1788)
* 0e0478b Unify the number format in the ourput of portstat and pfcstat in all cases (#1795)
* 2d1e00e [ecnconfig] Fix exception seen during display and add unit tests (#1784) (#1789)

Signed-off-by: Volodymyr Samotiy <volodymyrs@nvidia.com>