Update git submodules

* Update docs/submodules/usecase-ui.git from branch 'master'
  to 022fc8ffb93ff1f0b5bd1c8072b810fa9fb16b7b
  - style: optimize the style of the onboard page
    
    Change-Id: I97d479f904ef2b2900974f8b66920607ac6c3c25
    Issue-ID: USECASEUI-307
    Signed-off-by: cyuamber <xuranyjy@chinamobile.com>
    
diff --git a/docs/submodules/usecase-ui.git b/docs/submodules/usecase-ui.git
index 42c20d4..022fc8f 160000
--- a/docs/submodules/usecase-ui.git
+++ b/docs/submodules/usecase-ui.git
@@ -1 +1 @@
-Subproject commit 42c20d426231d279bc0e94258bc58f6a89f9e836
+Subproject commit 022fc8ffb93ff1f0b5bd1c8072b810fa9fb16b7b