Update hdinsight-release-notes.md

Added links to docs about Spark and Kafka retirement.

Author: mimig1

articles/hdinsight/hdinsight-release-notes.md

@@ -43,13 +43,13 @@ No behavior changes for this release. To get ready for upcoming changes, see [Up
 The following changes will happen in upcoming releases. 
 
 ### Deprecation of Spark 2.1 and 2.2 in HDInsight 3.6 Spark cluster
-Starting July 1, 2020, customers will not be able to create new Spark clusters with Spark 2.1 and 2.2 on HDInsight 3.6. Existing clusters will run as is without support from Microsoft. Consider moving to Spark 2.3 on HDInsight 3.6 by June 30, 2020 to avoid potential system/support interruption.
+Starting July 1, 2020, customers will not be able to create new Spark clusters with Spark 2.1 and 2.2 on HDInsight 3.6. Existing clusters will run as is without support from Microsoft. Consider moving to Spark 2.3 on HDInsight 3.6 by June 30, 2020 to avoid potential system/support interruption. For more information, see [Migrate Apache Spark 2.1 and 2.2 workloads to 2.3 and 2.4](./spark/migrate-versions).
 
 ### Deprecation of Spark 2.3 in HDInsight 4.0 Spark cluster
-Starting July 1, 2020, customers will not be able to create new Spark clusters with Spark 2.3 on HDInsight 4.0. Existing clusters will run as is without support from Microsoft. Consider moving to Spark 2.4 on HDInsight 4.0 by June 30, 2020 to avoid potential system/support interruption.
+Starting July 1, 2020, customers will not be able to create new Spark clusters with Spark 2.3 on HDInsight 4.0. Existing clusters will run as is without support from Microsoft. Consider moving to Spark 2.4 on HDInsight 4.0 by June 30, 2020 to avoid potential system/support interruption. For more information, see [Migrate Apache Spark 2.1 and 2.2 workloads to 2.3 and 2.4](./spark/migrate-versions).
 
 ### Deprecation of Kafka 1.1 in HDInsight 4.0 Kafka cluster
-Starting July 1 2020, customers will not be able to create new Kafka clusters with Kafka 1.1 on HDInsight 4.0. Existing clusters will run as is without support from Microsoft. Consider moving to Kafka 2.1 on HDInsight 4.0 by June 30 2020 to avoid potential system/support interruption.
+Starting July 1 2020, customers will not be able to create new Kafka clusters with Kafka 1.1 on HDInsight 4.0. Existing clusters will run as is without support from Microsoft. Consider moving to Kafka 2.1 on HDInsight 4.0 by June 30 2020 to avoid potential system/support interruption. For more information, see [Migrate Apache Kafka workloads to Azure HDInsight 4.0](./kafka/migrate-versions).
 
 ### HBase 2.0 to 2.1.6
 In the upcoming HDInsight 4.0 release, HBase version will be upgraded from version 2.0 to 2.1.6