Change the actual java

Author: dongjoon-hyun

spark-operator-api/src/main/java/org/apache/spark/k8s/operator/Constants.java

@@ -22,7 +22,7 @@
 @SuppressWarnings("PMD.DataClass")
 public class Constants {
   public static final String API_GROUP = "spark.apache.org";
-  public static final String API_VERSION = "v1alpha1";
+  public static final String API_VERSION = "v1beta1";
   public static final String LABEL_SPARK_APPLICATION_NAME = "spark.operator/spark-app-name";
   public static final String LABEL_SPARK_CLUSTER_NAME = "spark.operator/spark-cluster-name";
   public static final String LABEL_SPARK_OPERATOR_NAME = "spark.operator/name";