update supported versions

Author: razvan

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

@@ -3,5 +3,6 @@
 // Stackable Platform documentation.
 // Please sort the versions in descending order (newest first)
 
+- 4.0.0 (Hadoop 3.4.1, Scala 2.13, Python 3.11, Java 17) (Experimental)
 - 3.5.5 (Hadoop 3.3.4, Scala 2.12, Python 3.11, Java 17) (Deprecated)
 - 3.5.6 (Hadoop 3.3.4, Scala 2.12, Python 3.11, Java 17) (LTS)