fix: typo (#19820)

Author: qianlei90

content/zh/docs/setup/release/version-skew-policy.md

@@ -115,7 +115,7 @@ Example:
 `kube-controller-manager`, `kube-scheduler`, and `cloud-controller-manager` must not be newer than the `kube-apiserver` instances they communicate with. They are expected to match the `kube-apiserver` minor version, but may be up to one minor version older (to allow live upgrades).
 -->
 `kube-controller-manager`、`kube-scheduler` 和 `cloud-controller-manager` 版本不能高于 `kube-apiserver` 版本号。
-最好它们的版本号与 `kube-apiserver` 保持一致，但允许比 `kube-apiserver` 低一个小版本（为了支持在线生级）。
+最好它们的版本号与 `kube-apiserver` 保持一致，但允许比 `kube-apiserver` 低一个小版本（为了支持在线升级）。
 
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