Fix image name and add scala version.

Author: razvan

docs/modules/spark-k8s/pages/index.adoc

@@ -58,7 +58,7 @@ The Stackable Operator for Apache Spark on Kubernetes currently supports the fol
 
 include::partial$supported-versions.adoc[]
 
-The Spark images do not include Python. For PySpark users, there are separate images called `pyspark` instead of `spark`. These come with different Python versions as follows:
+The Spark images do not include Python. For PySpark users, there are separate images called `pyspark-k8s` instead of `spark-k8s`. These come with different Python versions as follows:
 
-- pyspark:3.3.0-hadoop3 : Python 3.9
-- pyspark:3.4.0-hadoop3 : Python 3.11
+- pyspark-k8s:3.3.0-hadoop3 : Python 3.9
+- pyspark-k8s:3.4.0-hadoop3 : Python 3.11

docs/modules/spark-k8s/partials/supported-versions.adoc

@@ -2,5 +2,5 @@
 // This is a separate file, since it is used by both the direct Spark documentation, and the overarching
 // Stackable Platform documentation.
 
-- 3.3.0-hadoop3 (Hadoop 3.3.3, Java 11)
-- 3.4.0-hadoop3 (Hadoop 3.3.4, Java 11)
+- 3.3.0-hadoop3 (Hadoop 3.3.3, Scala 2.12, Java 11)
+- 3.4.0-hadoop3 (Hadoop 3.3.4, Scala 2.12, Java 11)