Fix isCloud

Author: enm10k

lib/nocodb_sdk/utils.dart

@@ -1,6 +1,6 @@
 final _cloudHosts = [
   'app.nocodb.com',
   ...(const String.fromEnvironment('NC_CLOUD_HOSTS').split(',')),
-];
+].where((h) => h.isNotEmpty);
 
 bool isCloud(String host) => _cloudHosts.any((h) => host.contains(h));