Correct the description of "Total RU of user resource groups" (#20916) (#20984)

Author: ti-chi-bot

dashboard/dashboard-resource-manager.md

@@ -47,7 +47,7 @@ Before resource planning, you need to know the overall capacity of the cluster.
 
   ![Calibrate by Hardware](/media/dashboard/dashboard-resource-manager-calibrate-by-hardware.png)
 
-    The **Total RU of user resource groups** represents the total amount of RU for all user resource groups, excluding the `default` resource group. If this value is less than the estimated capacity, the system triggers an alert. By default, the system allocates unlimited usage to the predefined `default` resource group. When all users belong to the `default` resource group, resources are allocated in the same way as when resource control is disabled.
+    The **Total RU of user resource groups** represents the total amount of RU for all user resource groups, excluding the `default` resource group. If this value is more than the estimated capacity, the system triggers an alert. By default, the system allocates unlimited usage to the predefined `default` resource group. When all users belong to the `default` resource group, resources are allocated in the same way as when resource control is disabled.
 
 - [Estimate capacity based on actual workload](/sql-statements/sql-statement-calibrate-resource.md#estimate-capacity-based-on-actual-workload)
 
@@ -79,4 +79,4 @@ By observing the metrics on the panels, you can understand the current overall r
 - TiKV
     - CPU Quota: The maximum CPU usage of TiKV.
     - CPU Usage: The total CPU usage of all TiKV instances.
-    - IO MBps: The total I/O throughput of all TiKV instances.
+    - IO MBps: The total I/O throughput of all TiKV instances.