fix: Temporarily work around OpenSSH CVE-2024-6387 RCE
Based on https://discourse.nixos.org/t/security-advisory-openssh-cve-2024-6387-regresshion-update-your-servers-asap/48220/3, until the upgraded package is available https://nixpk.gs/pr-tracker.html?pr=323753.
Edited by Victor Engmark