[sonic-utilities]: Advance submodule

Update sonic-utilities submodule to include below commits:
510a9b9 Add date to show version (sonic-net#2086)
61b1396 [sfpshow][recycle_port] sfpshow script needs to skip recycle ports (sonic-net#2109)
4681697 Support command `show ip fib` and `show ipv6 fib` (sonic-net#2100)
2a982a1 Update `config mirror_session` CLI to support heximal gre type value (sonic-net#2095)
b25f1e1 [generic-config-updater] Add caclrule validator (sonic-net#2103)
968900c [sonic-package-manager] do not mod_config for whole config db when setting init_cfg (sonic-net#2055)
bf55ceb [nvgre] Added auto-generated CLI plugins and test for NVGRE Tunnel feature (sonic-net#1915)

Author: liorghub