fixing broken link

Author: Larry Franks

articles/machine-learning/index.yml

@@ -108,7 +108,7 @@ landingContent:
           - text: Realtime prediction
             url: how-to-consume-web-service.md
           - text: Batch prediction 
-            url: how-to-run-batch-predictions.md
+            url: how-to-use-parallel-run-step.md
           - text: End-to-end examples (GitHub)
             url: https://github.com/microsoft/MLOps