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

Change-Id: Ia41e162394fa0f9ab9ae05c16db0c3032fde19cf
diff --git a/Documentation/project-setup.txt b/Documentation/project-setup.txt
index 25d455f..4b755f3 100644
--- a/Documentation/project-setup.txt
+++ b/Documentation/project-setup.txt
@@ -217,7 +217,7 @@
 new branches from the Web UI or via REST even without having the
 `Create Reference` access right.
 
-When using the WebUI, the REST endpoint or the SSH command it is only
+When using the Web UI, the REST endpoint or the SSH command it is only
 possible to create branches on commits that already exist in the
 repository.