[submodule update] sonic-utilities

97d971372fac773b98d46bb8f800df7b845e518e (HEAD -> 201911, origin/201911) [sfpshow] Gracefully handle improper 'specification_compliance' field (#1594) (#1729)
2099c73cea81ff4524e680b6f9335c0b0f13b94e [CLI] Implement null_route_helper script (#1740)
b56659175986fe0e5b82c6bd6b3dde163164777b [minigraph][port_config] Consume port_config.json while reloading minigraph (#1725)
e840c42da2a40db2bf993672271f6b75c51c426f Change the method name to align with master, reduce diverge issue (#1703)

Signed-off-by: Abhishek Dosi <abdosi@microsoft.com>