Update TOC.yml

Author: sidramadoss

articles/stream-analytics/TOC.yml

@@ -65,7 +65,7 @@
     items:
     - name: Understand and adjust Streaming Units
       href: stream-analytics-streaming-unit-consumption.md
-    - name: Create parallelizable jobs
+    - name: Improve query performance
       href: stream-analytics-parallelization.md
     - name: Repartition your input
       href: repartition.md