Update git submodules

* Update docs/submodules/usecase-ui.git from branch 'master'
  to e4b51383fc0ca026d4268d28f59b9032c8d8f789
  - Merge "feat: optimization request function"
  - feat: optimization request function
    
    Change-Id: I9382aaabbc6d96ff405ef1bf3e1f96bacfbc1e0b
    Issue-ID: USECASEUI-307
    Signed-off-by: cyuamber <xuranyjy@chinamobile.com>
    
1 file changed