Update git submodules

* Update docs/submodules/usecase-ui.git from branch 'master'
  to 539ffea7725b9475118c84c35a49ae5024bd7a79
  - feat: Modify the parameters submitted when nsmf is created
    
    Change-Id: I13f59ed32d3d6f8be5404a8876164764feec35e1
    Issue-ID: USECASEUI-368
    Signed-off-by: cyuamber <xuranyjy@chinamobile.com>
    
1 file changed