correctly spelling 'tags'...

ManualStoryboard/Metadata.xml

@@ -3,6 +3,6 @@
 	<ID>6870d304-f6bc-46db-940a-a82c3a7d205b</ID>
 	<IsFullApplication>false</IsFullApplication>
 	<Level>Beginning</Level>
-	<tag>User Interface</tag>
+	<Tags>User Interface</Tags>
 	<Gallery>false</Gallery>
 </SampleMetadata>