change cloud URL in weave script, again, because typo

weave

@@ -96,7 +96,7 @@ where <peer>     = <ip_address_or_fqdn>[:<port>]
       <peer_id>  = <nickname> | <weave internal peer ID>
       <mode>     = consensus[=<count>] | seed=<mac>,... | observer
 
-To troubleshoot and visualize Weave networks, try Weave Cloud: http://www.weave.works/product/cloud
+To troubleshoot and visualize Weave networks, try Weave Cloud: http://www.weave.works/product/cloud/
 EOF
 }