fix config streampark.flink-k8s.ingress.class default value (#3453)

Co-authored-by: 毕博 <bibo@mafengwo.com>
diff --git a/streampark-common/src/main/scala/org/apache/streampark/common/conf/K8sFlinkConfig.scala b/streampark-common/src/main/scala/org/apache/streampark/common/conf/K8sFlinkConfig.scala
index 3b70594..3480dc1 100644
--- a/streampark-common/src/main/scala/org/apache/streampark/common/conf/K8sFlinkConfig.scala
+++ b/streampark-common/src/main/scala/org/apache/streampark/common/conf/K8sFlinkConfig.scala
@@ -79,7 +79,7 @@
    */
   val ingressClass: InternalOption = InternalOption(
     key = "streampark.flink-k8s.ingress.class",
-    defaultValue = "streampark",
+    defaultValue = "nginx",
     classType = classOf[java.lang.String],
     description = "Direct ingress to the ingress controller."
   )