update tags

UIImageEffects/Metadata.xml

@@ -3,8 +3,8 @@
 	<ID>9d40b32a-aa38-47e2-ab80-907ca3569cf5</ID>
 	<IsFullApplication>false</IsFullApplication>
 	<Level>Intermediate</Level>
-	<Tags>Media, Image</Tags>
+	<Tags>Media, Graphics</Tags>
     <SupportedPlatforms>iOS</SupportedPlatforms>
     <LicenseRequirement>Starter</LicenseRequirement>
 	<Gallery>true</Gallery>
-</SampleMetadata>
+</SampleMetadata>