Update TOC.yml

reordering conceptual articles

Author: hrasheed-msft

articles/hdinsight/hadoop/TOC.yml

@@ -36,6 +36,15 @@
     maintainContext: true
 - name: Concepts
   items:
+  - name: HDInsight 4.0
+    href: ../hdinsight-version-release.md
+    maintainContext: true
+  - name: Apache Hadoop architecture in HDInsight
+    href: ../hdinsight-hadoop-architecture.md
+    maintainContext: true
+  - name: Apache Hadoop components in HDInsight
+    href: ../hdinsight-component-versioning.md
+    maintainContext: true
   - name: Cluster capacity planning
     href: ../hdinsight-capacity-planning.md
     maintainContext: true
@@ -48,15 +57,6 @@
   - name: Understand managed identities
     href: ../hdinsight-managed-identities.md
     maintainContext: true
-  - name: Apache Hadoop architecture in HDInsight
-    href: ../hdinsight-hadoop-architecture.md
-    maintainContext: true
-  - name: Apache Hadoop components in HDInsight
-    href: ../hdinsight-component-versioning.md
-    maintainContext: true
-  - name: HDInsight 4.0
-    href: ../hdinsight-version-release.md
-    maintainContext: true
 - name: How to
   items:
   - name: Use Apache Hadoop sandbox