[sonic-utilities] Update submodule (#3235)

* src/sonic-utilities ee56d54...cb0e745 (11):
  > sonic_utilities: Support for DOM Threshold values for EEPROM dump
(#545)
  > [portstat] Fix portstat show RX_UTIL over 100% for 100G (#563)
  > sonic_installer: fix read-only filesystem support for firmware
update (#565)
  > Revert "show acl table command output should show binding column
correctly even with single port (#447)" (#589)
  > show acl table command output should show binding column correctly
even with single port (#447)
  > [config] Do no stop or restart dependent services (#582)
  > sfpshow: prevent 'show int trans eeprom --dom' from crashing (#567)
  > [warm-reboot] add docker upgrade --warm option and roll back support
(#559)
  > [ecnconfig] Validate input WRED parameters (#579)
  > [sonic-utilities] Add fstrim to reboot (#535)
  > Fixing the expected neighbor command due to change in output format
under sonic-buildimage/pull/3036 (#584)