Update git submodules

* Update docs/submodules/usecase-ui.git from branch 'master'
  to 3b3fb006f53be86ae501b220cb686dfddc3413a3
  - feat:mock local json data for ccvpn detail page
    
    Change-Id: I96ce2196781da06eae5ba3054bfe710fc5f34a93
    Issue-ID: USECASEUI-307
    Signed-off-by: cyuamber <xuranyjy@chinamobile.com>
    
1 file changed