[Backport 2.x] Fix typo super->sb in method toString() of RemoteStoreNodeAttribute(#15362)

CHANGELOG.md

@@ -86,6 +86,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - [Streaming Indexing] Fix intermittent 'The bulk request must be terminated by a newline [\n]' failures [#16337](https://github.com/opensearch-project/OpenSearch/pull/16337))
 - Fix wrong default value when setting `index.number_of_routing_shards` to null on index creation ([#16331](https://github.com/opensearch-project/OpenSearch/pull/16331))
 - [Workload Management] Make query groups persistent across process restarts [#16370](https://github.com/opensearch-project/OpenSearch/pull/16370)
+- Fix typo super->sb in method toString() of RemoteStoreNodeAttribute ([#15362](https://github.com/opensearch-project/OpenSearch/pull/15362))
 - Fix array hashCode calculation in ResyncReplicationRequest ([#16378](https://github.com/opensearch-project/OpenSearch/pull/16378))
 
 ### Security

server/src/main/java/org/opensearch/node/remotestore/RemoteStoreNodeAttribute.java

@@ -287,6 +287,6 @@ public boolean equals(Object o) {
     public String toString() {
         StringBuilder sb = new StringBuilder();
         sb.append('{').append(this.repositoriesMetadata).append('}');
-        return super.toString();
+        return sb.toString();
     }
 }