fix artifact

Jenkinsfile2

@@ -3,7 +3,7 @@
     parameters{
         buildSelector(
             defaultSelector: lastSuccessful(),
-            name: 's444417-create-dataset',
+            name: 'BUILD_SELECTOR',
             description: 'Build selector for Copy artifact'
         )
 
@@ -24,7 +24,7 @@
                 )
                 sh "chmod u+x ./startscript2.sh"
                 sh " ./startscript2.sh"
-                archiveArtifacts artifacts: 'data.txt'
+                archiveArtifacts artifacts: 'num_lines.txt'
             }
         }     
     }