[202012] [submodule] Update submodule for sonic-utilities (#14357)

This PR includes the following commits
```
5b0f0fc [202012][dhcp_relay] Fix dhcp_relay restart error while add/del vlan (sonic-net/sonic-utilities#2688)
48fd842 [show][muxcable] increase timeout for displaying HW_STATUS (sonic-net/sonic-utilities#2712)
f0a9f4f [dhcp_relay] Add show/clear/counter cli for dhcp_relay (sonic-net/sonic-utilities#2719)
8627944 Revert "[202012] Update load minigraph to load backend acl" (sonic-net/sonic-utilities#2736)
93c7d43 [warm-reboot] Use kexec_file_load instead of kexec_load when available (sonic-net/sonic-utilities#2608)
cc78747 [warm/fast-reboot] Backup logs from tmpfs to disk during fast/warm shutdown (sonic-net/sonic-utilities#2714)
```

Author: neethajohn