Update git submodules

* Update docs/submodules/usecase-ui.git from branch 'master'
  to bc115d88c7cbb728880839dd5e32987db167234b
  - feat: add some i18n resource
    
    Change-Id: I2686afd33ef3eb2138ac1130416618ba2005929b
    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 87f4002..bc115d8 160000
--- a/docs/submodules/usecase-ui.git
+++ b/docs/submodules/usecase-ui.git
@@ -1 +1 @@
-Subproject commit 87f400207edddbe97c423ea87dc55a7b4a9ea03f
+Subproject commit bc115d88c7cbb728880839dd5e32987db167234b