Update hello-world.md

doc/examples/hello-world/hello-world.md

@@ -7,7 +7,7 @@ Hello world example explains SPipes script construction, execution, and executio
 We create simple *script* that contain only one *pipeline*. The *pipeline* constructs hello world message for a person within RDF language. The person is identified by *pipeline*'s *input parameter*s `?firstName` and `?lastName`. 
 Output of the pipeline in RDF for `?firstName=Robert` and `?lastName=Plant` is 
 
-    <http://onto.fel.cvut.cz/ontologies/s-pipes/hello-world-example-0.1/Robert-Plant> <http://onto.fel.cvut.cz/ontologies/s-pipes/hello-world-example-0.1/is-greeted-by-message> "Hello Robert Plant." .
+    <http://onto.fel.cvut.cz/ontologies/s-pipes/hello-world-example-0.1/robert-palant> <http://onto.fel.cvut.cz/ontologies/s-pipes/hello-world-example-0.1/is-greeted-by-message> "Hello Robert Plant." .
 
 Our pipeline however returns the message in JSON-LD serialization of this RDF, which is