Update git submodules

* Update docs/submodules/usecase-ui.git from branch 'master'
  to ada66a7003888a1257b479f0bb12e52991bef82c
  - docs: change the release version of Frankfurt
    
    Change-Id: Id425c89786924060d6da12790d92eeb082467c8d
    Issue-ID: USECASEUI-435
    Signed-off-by: cyuamber <xuranyjy@chinamobile.com>
    
1 file changed