Update git submodules

* Update docs/submodules/usecase-ui.git from branch 'master'
  to 5c9f4896c435936f41c54107626de7f700e3a012
  - Merge "feat: add ajax request function"
  - feat: add ajax request function
    
    Change-Id: Ib52fbe8c39f5d1e37dc4880c36f5a68171530d38
    Issue-ID: USECASEUI-307
    Signed-off-by: cyuamber <xuranyjy@chinamobile.com>
    
1 file changed