Update git submodules

* Update docs/submodules/usecase-ui.git from branch 'master'
  to 3e98e74f75f40b1c3a5d517403feadf1064e8ae0
  - feat: add CSMF doc
    
    Change-Id: Ic0997ebcd34e67adef93c47484ab08651159e500
    Issue-ID: USECASEUI-374
    Signed-off-by: cyuamber <xuranyjy@chinamobile.com>
    
1 file changed