fix TOC link

Author: hrasheed-msft

articles/hdinsight/TOC.yml

@@ -36,7 +36,7 @@
     - name: Apache Hadoop components on HDInsight
       href: ./hdinsight-component-versioning.md
     - name: High availability components
-      href: ./high-availability-components.md     
+      href: ./hdinsight-high-availability-components.md     
     - name: Machine learning in HDInsight
       href: ./hdinsight-machine-learning-overview.md
     - name: Streaming at scale in HDInsight