[201911][submodule] Update sonic-utilities submodule (#6966)

- [201911][acl] Expand VLAN into VLAN members when creating an ACL table (#1477)
- [201911][acl-loader] Add support for matching on ICMP and VLAN info (#1476)
- [201911][acl-loader] Improve input validation for acl_loader (#1481)

Signed-off-by: Danny Allen <daall@microsoft.com>