Docs: Fix broken link in upgrade notes (#21698)

Fixes a broken link in the 6.6 upgrade notes.

docs/sources/installation/upgrading.md

@@ -233,7 +233,7 @@ Chrome 80 treats cookies as `SameSite=Lax` by default if no `SameSite` attribute
 
 
 Due to this change in Chrome, the `[security]` setting `cookie_samesite` configured to `none` now renders cookies with `SameSite=None` attribute compared to before where no `SameSite` attribute was added to cookies. To get the old behavior, use value `disabled` instead of `none`, see [cookie_samesite in Configuration]({{< relref "configuration/#cookie-samesite" >}}) for more information.
 Due to this change in Chrome, the `[security]` setting `cookie_samesite` configured to `none` now renders cookies with `SameSite=None` attribute compared to before where no `SameSite` attribute was added to cookies. To get the old behavior, use value `disabled` instead of `none`, see [cookie_samesite in Configuration]({{< relref "configuration/#cookie-samesite" >}}) for more information.
 
 
-**Note:** There is currently a bug affecting Mac OSX and iOS that causes `SameSite=None` cookies to be treated as `SameSite=Strict` and therefore not sent with cross-site requests. (See https://bugs.webkit.org/show_bug.cgi?id=198181.) Until this is fixed, `SameSite=None` might not work properly on Safari.
+**Note:** There is currently a bug affecting Mac OSX and iOS that causes `SameSite=None` cookies to be treated as `SameSite=Strict` and therefore not sent with cross-site requests, see https://bugs.webkit.org/show_bug.cgi?id=198181 for details. Until this is fixed, `SameSite=None` might not work properly on Safari.
 
 
 This version of Chrome also rejects insecure `SameSite=None` cookies. See https://www.chromestatus.com/feature/5633521622188032 for more information. Make sure that you
 This version of Chrome also rejects insecure `SameSite=None` cookies. See https://www.chromestatus.com/feature/5633521622188032 for more information. Make sure that you
 change the `[security]` setting `cookie_secure` to `true` and use HTTPS when `cookie_samesite` is configured to `none`, otherwise authentication in Grafana won't work properly.
 change the `[security]` setting `cookie_secure` to `true` and use HTTPS when `cookie_samesite` is configured to `none`, otherwise authentication in Grafana won't work properly.