Merge pull request kubernetes#57868 from Lion-Wei/ipvs-5

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

fix ipvs proxy mode kubeadm usage

**What this PR does / why we need it**:
Fix ipvs proxy mode usage of kubeadm in ipvs README file.

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes # 

**Release note**:
```release-note
NONE
```

Author: Kubernetes Submit Queue

pkg/proxy/ipvs/README.md

@@ -39,9 +39,11 @@ Then the configuration file is similar to:
 kind: MasterConfiguration
 apiVersion: kubeadm.k8s.io/v1alpha1
 ...
-featureGates:
-  SupportIPVSProxyMode: true
-mode: ipvs
+kubeProxy:
+  config:
+    featureGates: SupportIPVSProxyMode=true
+    mode: ipvs
+...
 ```
 
 ## Debug