Use new API endpoint URL

CloudObjects/SDK/ObjectRetriever.php

@@ -31,7 +31,7 @@ class ObjectRetriever implements CustomCacheAndLogInterface {
 	private $objects;
 	private $defaultReader;
 
-	const CO_API_URL = 'https://api.cloudobjects.net/';
+	const CO_API_URL = 'https://od.coid.link/';
 	
 	const REVISION_PROPERTY = 'coid://cloudobjects.io/isAtRevision';