rename syncPlanningWorkerNodes from comments

Signed-off-by: Xun Zhang <xunzh@amazon.com>

Author: Zhangxunmt

plugin/src/main/java/org/opensearch/ml/model/MLModelCache.java

@@ -146,7 +146,7 @@ public void syncWorkerNode(Set<String> workerNodes) {
         this.workerNodes.addAll(workerNodes);
     }
 
-    public void syncPlanningWorkerNode(Set<String> planningWorkerNodes) {
+    public void syncPlanningWorkerNodes(Set<String> planningWorkerNodes) {
         this.targetWorkerNodes.clear();
         this.targetWorkerNodes.addAll(planningWorkerNodes);
     }

plugin/src/main/java/org/opensearch/ml/model/MLModelCacheHelper.java

@@ -632,7 +632,7 @@ public void syncPlanningWorkerNodes(Map<String, Set<String>> modelPlanningWorker
         log.debug("sync model planning worker nodes");
         modelPlanningWorkerNodes.entrySet().forEach(entry -> {
             MLModelCache modelCache = getOrCreateModelCache(entry.getKey());
-            modelCache.syncPlanningWorkerNode(entry.getValue());
+            modelCache.syncPlanningWorkerNodes(entry.getValue());
         });
     }