This update for cockpit fixes the following issues:

- new version 320:

* pam-ssh-add: Fix insecure killing of session ssh-agent
(boo#1226040, CVE-2024-6126)

- changes in older versions:

* Storage: Btrfs snapshots
* Podman: Add image pull action
* Files: Bookmark support
* webserver: System user changes
* Metrics: Grafana setup now prefers Valkey
- Invalid json against the storaged manifest boo#1227299