added missing use Saft\Rdf\NodeUtils in Rest/README.md

Author: k00ni

src/Saft/Skeleton/Rest/README.md

@@ -28,6 +28,7 @@ Example code:
 
 ```php
 use Saft\Rdf\NodeFactoryImpl;
+use Saft\Rdf\NodeUtils;
 use Saft\Rdf\StatementFactoryImpl;
 use Saft\Rdf\StatementIteratorFactoryImpl;
 use Saft\Sparql\Query\QueryFactoryImpl;