sync main with release branch changes to getting started script (#262)

# Description

sync main with release branch changes to getting started script.

Author: adwk67

docs/modules/spark-k8s/examples/getting_started/getting_started.sh.j2

@@ -58,22 +58,22 @@ metadata:
   namespace: default
 spec:
   version: "1.0"
-  sparkImage: docker.stackable.tech/stackable/pyspark-k8s:3.3.0-0.0.0-dev
+  sparkImage: docker.stackable.tech/stackable/pyspark-k8s:3.3.0-stackable{{ versions.spark }}
   mode: cluster
   mainApplicationFile: local:///stackable/spark/examples/src/main/python/pi.py
   driver:
     resources:
       cpu:
         min: "1"
-        max: "1200m"
+        max: "2"
       memory:
         limit: "1Gi"
   executor:
-    instances: 3
+    instances: 1
     resources:
       cpu:
         min: "1"
-        max: "1200m"
+        max: "2"
       memory:
         limit: "1Gi"
 EOF