Merge pull request #48975 from my-git9/pp-18395

[zh-cn]sync translate-stream-close-websocket-requests

Author: k8s-ci-robot

content/zh-cn/docs/reference/command-line-tools-reference/feature-gates/translate-stream-close-websocket-requests.md

@@ -6,6 +6,11 @@ _build:
   render: false
 
 stages:
+  - stage: alpha
+    defaultValue: false
+    fromVersion: "1.29"
+    toVersion: "1.29"
+
   - stage: beta
     defaultValue: true
     fromVersion: "1.30"