Clarify 2.3.2 only

Author: holdenk

README.md

@@ -26,7 +26,7 @@ The Python component depends on the package listed in requirements.txt (as well
 The script `build_and_package.sh` builds & tests both the Scala and Python code.
 
 
-For now this only works with Spark 2.3.0, it needs some changes to support 2.3.1+.
+For now this only works with Spark 2.3.2, it needs some changes to support other versions.
 
 ### Tests