Doc: Consistently refer to "Web UI" rather than "WebUI"

Change-Id: Ia41e162394fa0f9ab9ae05c16db0c3032fde19cf

Documentation/error-change-closed.txt

diff --git a/Documentation/error-change-closed.txt b/Documentation/error-change-closed.txt
index d8842c5..a239ef1 100644
--- a/Documentation/error-change-closed.txt
+++ b/Documentation/error-change-closed.txt
@@ -20,8 +20,8 @@
 
 If the change for which you wanted to upload a new patch set was
 abandoned and your new changes overcome the reasons for abandoning
-this change you may want to restore the change in the Gerrit WebUI
-(browse the abandoned change in the Gerrit WebUI and click on the
+this change you may want to restore the change in the Gerrit Web UI
+(browse the abandoned change in the Gerrit Web UI and click on the
 'Restore Change' button). Afterwards the push should succeed and a
 new patch set for this change will be created.