DOCSP-48729-Update-Kafka-via-Docker-docs (#244)

Author: mmaville-mdb

source/installation/kafka-deployments/install-docker.txt

@@ -52,9 +52,9 @@ Steps
 
    .. step:: Configure environment variables
 
-      a. Configure ``MIGRATOR_DATA_PATH``
+      a. Configure ``MIGRATOR_PATH_DATA``
 
-         In your ``docker-compose`` file, configure the ``MIGRATOR_DATA_PATH`` variable to a 
+         In your ``docker-compose`` file, configure the ``MIGRATOR_PATH_DATA`` variable to a 
          path where Relational Migrator saves data for persistence.
 
       b. (Optional) If your source database is MySQL or Oracle, configure ``MIGRATOR_PATH_DRIVER``