Update git submodules

* Update docs/submodules/usecase-ui.git from branch 'master'
  to 2df65a7f82faf11f0f0a6e16c9864902a9388c89
  - docs: add user guide
    
    Change-Id: I1dff40c8c1bb98da5729c753ce015e48d673912c
    Issue-ID: USECASEUI-307
    Signed-off-by: cyuamber <xuranyjy@chinamobile.com>
    
1 file changed