fixed the update link

componentbuilder_update_server.xml

@@ -160,7 +160,7 @@
 		<version>2.6.0</version>
 		<infourl title="Component Builder!">http://vdm.bz/component-builder</infourl>
 		<downloads>
-			<downloadurl type="full" format="zip">https://github.com/vdm-io/Joomla-Component-Builder/releases/download/v2.6.0/JCB_v2.6.0zip</downloadurl>
+			<downloadurl type="full" format="zip">https://github.com/vdm-io/Joomla-Component-Builder/releases/download/v2.6.0/JCB_v2.6.0.zip</downloadurl>
 		</downloads>
 		<tags>
 			<tag>stable</tag>