Update git submodules

* Update docs/submodules/usecase-ui.git from branch 'master'
  to 018a3535bdce505faf630c7cfea57015f5e2d042
  - fix: fix docs image
    
    Change-Id: Idd03035e8fac987b8679efbb6ce53315ad94265b
    Issue-ID: USECASEUI-306
    Signed-off-by: cyuamber <xuranyjy@chinamobile.com>
    
1 file changed