Data Flow now supports Spark 3.2.1, Conda Packs, and Delta Lakes

Data Flow now supports Spark 3.2.1. More information on migrating your Data Flow Applications to Spark 3.2.1 is available in the service guide. There are updates to the tutorials to reflect Spark 3.2.1. Support for Spark 3.2.1 means that Data Flow now supports Delta Lakes and can be integrated with Conda Packs.