add javadoc for ConfigObjectNode

Signed-off-by: Attila Mészáros <[email protected]>

Author: csviri

docs/content/docs/custom-resource/reference.md

@@ -60,7 +60,7 @@ This serves as a full reference for FlinkDeployment and FlinkSessionJob custom r
 ### ConfigObjectNode
 **Class**: org.apache.flink.kubernetes.operator.api.spec.ConfigObjectNode
 
-**Description**: 
+**Description**: Allows parsing configurations as YAML, and adds related utility methods.
 
 | Parameter | Type | Docs |
 | ----------| ---- | ---- |

flink-kubernetes-operator-api/src/main/java/org/apache/flink/kubernetes/operator/api/spec/ConfigObjectNode.java

@@ -28,7 +28,7 @@
 import java.util.Iterator;
 import java.util.Map;
 
-/** */
+/** Allows parsing configurations as YAML, and adds related utility methods. */
 public class ConfigObjectNode extends ObjectNode {
 
     public ConfigObjectNode() {