main/xen: update secfixes
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-20593
The number was probably already assigned but I was tired and in a hurry to patch.
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-20593
The number was probably already assigned but I was tired and in a hurry to patch.