Merge branch 'fluentd-image' into 'main'

Update default Fluentd image

See merge request weblogic-cloud/weblogic-kubernetes-operator!5026

Author: rjeberhard

operator/src/main/java/oracle/kubernetes/operator/KubernetesConstants.java

@@ -9,7 +9,7 @@
 public interface KubernetesConstants {
   String DEFAULT_IMAGE = "container-registry.oracle.com/middleware/weblogic:14.1.2.0-generic-jdk17-ol8";
   String DEFAULT_EXPORTER_IMAGE = "ghcr.io/oracle/weblogic-monitoring-exporter:2.3.6";
-  String DEFAULT_FLUENTD_IMAGE = "fluent/fluentd-kubernetes-daemonset:v1.16.1-debian-elasticsearch7-1.2";
+  String DEFAULT_FLUENTD_IMAGE = "fluent/fluentd-kubernetes-daemonset:v1.19-debian-elasticsearch7-1";
   String EXPORTER_CONTAINER_NAME = "monitoring-exporter";
   String LATEST_IMAGE_SUFFIX = ":latest";