[zh] Update authentication.md (#32291)

* [zh] Update authentication.md

Update authentication.md
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* Update authentication.md
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@ -1145,7 +1145,7 @@ The following HTTP headers can be used to performing an impersonation request:
* `Impersonate-User`: The username to act as.
* `Impersonate-Group`: A group name to act as. Can be provided multiple times to set multiple groups. Optional. Requires "Impersonate-User".
* `Impersonate-Extra-( extra name )`: A dynamic header used to associate extra fields with the user. Optional. Requires "Impersonate-User". In order to be preserved consistently, `( extra name )` should be lower-case, and any characters which aren't [legal in HTTP header labels](https://tools.ietf.org/html/rfc7230#section-3.2.6) MUST be utf8 and [percent-encoded](https://tools.ietf.org/html/rfc3986#section-2.1).
* `Impersonate-Extra-( extra name )`: A dynamic header used to associate extra fields with the user. Optional. Requires "Impersonate-User". In order to be preserved consistently, `( extra name )` must be lower-case, and any characters which aren't [legal in HTTP header labels](https://tools.ietf.org/html/rfc7230#section-3.2.6) MUST be utf8 and [percent-encoded](https://tools.ietf.org/html/rfc3986#section-2.1).
* `Impersonate-Uid`: A unique identifier that represents the user being impersonated. Optional. Requires "Impersonate-User". Kubernetes does not impose any format requirements on this string.
-->
以下 HTTP 头部字段可用来执行伪装请求:
@ -1841,7 +1841,8 @@ Certificates
<!--
Optionally, the response can include the expiry of the credential formatted as a
RFC3339 timestamp. Presence or absence of an expiry has the following impact:
[RFC 3339](https://datatracker.ietf.org/doc/html/rfc3339) timestamp.
Presence or absence of an expiry has the following impact:
- If an expiry is included, the bearer token and TLS credentials are cached until
the expiry time is reached, or if the server responds with a 401 HTTP status code,
@ -1849,7 +1850,9 @@ RFC3339 timestamp. Presence or absence of an expiry has the following impact:
- If an expiry is omitted, the bearer token and TLS credentials are cached until
the server responds with a 401 HTTP status code or until the process exits.
-->
作为一种可选方案,响应中还可以包含以 RFC3339 时间戳格式给出的证书到期时间。
作为一种可选方案,响应中还可以包含以
[RFC 3339](https://datatracker.ietf.org/doc/html/rfc3339)
时间戳格式给出的证书到期时间。
证书到期时间的有无会有如下影响:
- 如果响应中包含了到期时间,持有者令牌和 TLS 凭据会被缓存,直到到期期限到来、