Update the version numbers for the X-Remote-Extra- and Impersonate-Ex…

…tra- key fixes (#9827)

The fix was cherry picked into 1.11.3, 1.10.7, and 1.9.11:

kubernetes/kubernetes#67162
kubernetes/kubernetes#67163
kubernetes/kubernetes#67164

content/en/docs/reference/access-authn-authz/authentication.md

@@ -507,7 +507,7 @@ It is designed for use in combination with an authenticating proxy, which sets t
 * `--requestheader-group-headers` 1.6+. Optional, case-insensitive. "X-Remote-Group" is suggested. Header names to check, in order, for the user's groups. All values in all specified headers are used as group names.
 * `--requestheader-extra-headers-prefix` 1.6+. Optional, case-insensitive. "X-Remote-Extra-" is suggested. Header prefixes to look for to determine extra information about the user (typically used by the configured authorization plugin). Any headers beginning with any of the specified prefixes have the prefix removed. The remainder of the header name is lowercased and [percent-decoded](https://tools.ietf.org/html/rfc3986#section-2.1) and becomes the extra key, and the header value is the extra value.
 {{< note >}}
-**Note:** Prior to 1.11.2, the extra key could only contain characters which were [legal in HTTP header labels](https://tools.ietf.org/html/rfc7230#section-3.2.6).
+**Note:** Prior to 1.11.3 (and 1.10.7, 1.9.11), the extra key could only contain characters which were [legal in HTTP header labels](https://tools.ietf.org/html/rfc7230#section-3.2.6).
 {{< /note >}}
 
 For example, with this configuration:
@@ -597,7 +597,7 @@ The following HTTP headers can be used to performing an impersonation request:
 * `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).
 
 {{< note >}}
-**Note:** Prior to 1.11.2, `( extra name )` could only contain characters which were [legal in HTTP header labels](https://tools.ietf.org/html/rfc7230#section-3.2.6).
+**Note:** Prior to 1.11.3 (and 1.10.7, 1.9.11), `( extra name )` could only contain characters which were [legal in HTTP header labels](https://tools.ietf.org/html/rfc7230#section-3.2.6).
 {{< /note >}}
 
 An example set of headers: