release-managers: Add Security Release Team Slack contact methods

Signed-off-by: Stephen Augustus <[email protected]>

Author: justaugustus

content/en/releases/release-managers.md

@@ -25,8 +25,8 @@ The responsibilities of each role are described below.
 | Mailing List | Slack | Visibility | Usage | Membership |
 | --- | --- | --- | --- | --- |
 | [[email protected]](mailto:[email protected]) | [#release-management](https://kubernetes.slack.com/messages/CJH2GBF7Y) (channel) / @release-managers (user group) | Public | Public discussion for Release Managers | All Release Managers (including Associates, Build Admins, and SIG Chairs) |
-| [[email protected]](mailto:[email protected]) | [#release-private](https://kubernetes.slack.com/messages/GKEA5EL67) | Private | Private discussion for privileged Release Managers | Release Managers, SIG Release leadership |
-| [[email protected]](mailto:[email protected]) | N/A | Private | Security release coordination with the Product Security Committee | [[email protected]](mailto:[email protected]), [[email protected]](mailto:[email protected]) |
+| [[email protected]](mailto:[email protected]) | N/A | Private | Private discussion for privileged Release Managers | Release Managers, SIG Release leadership |
+| [[email protected]](mailto:[email protected]) | [#security-release-team](https://kubernetes.slack.com/archives/G0162T1RYHG) (channel) / @security-rel-team (user group) | Private | Security release coordination with the Product Security Committee | [[email protected]](mailto:[email protected]), [[email protected]](mailto:[email protected]) |
 
 ## Handbooks