modify

Signed-off-by: yunfeiyanggzq <yunfeiyang@buaa.edu.cn>

sentinel-cluster/sentinel-cluster-server-default/src/main/java/com/alibaba/csp/sentinel/cluster/flow/statistic/concurrent/CurrentConcurrencyManager.java

@@ -77,7 +77,7 @@ public static void remove(Long flowId) {
     }
 
     /**
-     * add the current concurrency.
+     * put the current concurrency.
      */
     public static void put(Long flowId, Integer nowCalls) {
         NOW_CALLS_MAP.put(flowId, new AtomicInteger(nowCalls));