[Improve] Fix typo. (#4246)

Author: Gianzie

streampark-console/streampark-console-service/src/main/java/org/apache/streampark/console/core/service/impl/FlinkClusterServiceImpl.java

@@ -348,11 +348,11 @@ public void remove(Long id) {
             || FlinkDeployMode.isKubernetesSessionMode(flinkCluster.getDeployMode())) {
             ApiAlertException.throwIfTrue(
                 ClusterState.isRunning(flinkCluster.getClusterStateEnum()),
-                "Flink cluster is running, cannot be delete, please check.");
+                "Flink cluster is running, cannot be deleted, please check.");
         }
         ApiAlertException.throwIfTrue(
             applicationInfoService.existsByClusterId(id),
-            "Some app on this cluster, the cluster cannot be delete, please check.");
+            "Some apps on this cluster, the cluster cannot be deleted, please check.");
         removeById(id);
     }