Merge pull request #26833 from njuptlzf/patch-2

Update flow-control.md

Author: k8s-ci-robot

content/zh/docs/concepts/cluster-administration/flow-control.md

@@ -95,10 +95,10 @@ kube-apiserver \
 
 <!--
 Alternatively, you can enable the v1alpha1 version of the API group
-with `--runtime-config=flowcontrol.apiserver.k8s.io/v1beta1=true`.
+with `--runtime-config=flowcontrol.apiserver.k8s.io/v1alpha1=true`.
 -->
 或者，你也可以通过
-`--runtime-config=flowcontrol.apiserver.k8s.io/v1beta1=true`
+`--runtime-config=flowcontrol.apiserver.k8s.io/v1alpha1=true`
 启用 API 组的 v1alpha1 版本。
 
 <!--