Apply suggestions from code review

Author: NickLarsenNZ

stacks/airflow/airflow.yaml

@@ -262,7 +262,7 @@ data:
       version: "1.0"
       sparkImage: docker.stackable.tech/stackable/pyspark-k8s:3.3.0-stackable23.4
       mode: cluster
-      mainApplicationFile: local:///stackable/spark/examples/src/release-23.11/python/pi.py
+      mainApplicationFile: local:///stackable/spark/examples/src/main/python/pi.py
       driver:
         cores: 1
         coreLimit: "1200m"