Update git submodules

* Update docs/submodules/usecase-ui.git from branch 'master'
  to c7eddd7f76b56d4bd7e41ef01286633d76914269
  - feat:Optimize string to uppercase of slicing page
    
    Change-Id: I3e990e32f46270754c351f17fa48479162f5ba52
    Issue-ID: USECASEUI-368
    Signed-off-by: cyuamber <xuranyjy@chinamobile.com>
    
diff --git a/docs/submodules/usecase-ui.git b/docs/submodules/usecase-ui.git
index fa7bc1a..c7eddd7 160000
--- a/docs/submodules/usecase-ui.git
+++ b/docs/submodules/usecase-ui.git
@@ -1 +1 @@
-Subproject commit fa7bc1af69c58120fa5a0746d75a4c08bccfd986
+Subproject commit c7eddd7f76b56d4bd7e41ef01286633d76914269