[submodule]: update sonic-utilities

* 270208b 2021-02-05 | [config reload]: Restart mux container (sonic-net#1401) (HEAD, origin/master, origin/HEAD) [Lawrence Lee]
* e6cce21 2021-02-04 | Advertise ipv6 link local address (sonic-net#1402) [Sumukha Tumkur Vani]
* a6e322a 2021-02-04 | [storyteller] Enhance the storyteller utility (sonic-net#1400) [Danny Allen]
* 5cff775 2021-02-05 | [show] Fix int status when portchannel is in the system (sonic-net#1376) [Dmytro]
* 9e0a4fa 2021-02-04 | [config][show] cli support for retrieving ber, eye-info and configuring prbs, loopback on Y-cable  (sonic-net#1386) [vdahiya12]
* 9ac47e5 2021-02-03 | Skip route check for tun0 interfaces (sonic-net#1399) [Prince Sunny]
* ba68aed 2021-02-03 | do not parse stderr to get correct routing stack (sonic-net#1398) [lguohan]
* aa7b90e 2021-02-03 | [storyteller] allow storyteller to work on downloaded logs (sonic-net#1388) [Ying Xie]
* a6ae218 2021-02-02 | [vrf]: Fix freezing during interface binding (sonic-net#1325) [maksymbelei95]
* 2e1f354 2021-02-01 | Use SonicV2Connector/ConfigDBConnector/SonicDBConfig from swsscommon instread of swsssdk (sonic-net#1392) [Qi Luo]

Signed-off-by: Guohan Lu <lguohan@gmail.com>