update the description for pingcap#5739

releases/release-8.5.0.md

@@ -151,11 +151,11 @@ Compared with the previous LTS 8.1.0, 8.5.0 includes new features, improvements,
 
 ### Reliability
 
-* Enabling rate limiter can protect PD from being crash under a large number of sudden requests and improve the stability of PD [#5739](https://github.com/tikv/pd/issues/5739) @[rleungx](https://github.com/rleungx)
+* Support configuring the rate limit and concurrency for gRPC API requests sent to PD [#5739](https://github.com/tikv/pd/issues/5739) @[rleungx](https://github.com/rleungx) **tw@qiancai** <!--2018-->
 
-    You can adjust the rate limiter configuration through pd-ctl. 
-    
-    For more information, see [Documentation](/stable/pd-control.md).
+    When a sudden influx of requests is sent to PD, it can lead to high workloads and potentially affect PD performance. Starting from v8.5.0, you can use [`pd-ctl`](/pd-control.md) to configure rate limits and concurrency for gRPC API requests sent to PD, improving its stability.
+
+    For more information, see [Documentation](/pd-control.md).
 
 ### Availability