root@pve:~# grub-mkconfig | grep 6.8.12-5-pve
Generating grub configuration file ...
W: This system is booted via proxmox-boot-tool:
W: Executing 'update-grub' directly does not update the correct configs!
W: Running: 'proxmox-boot-tool refresh'
Found linux image: /boot/vmlinuz-6.8.12-5-pve...