Update to Debian Bookworm

[Yannnd]

Although I managed to update the VM with apt tools from Debian 11 Bullseye to 12 Bookworm, it would be great if the BrowserBox VM would be using an up to date OS 'out of the box'.

Thanks for this simple and effective way to browse with more privacy and security!

[Torxgewinde]

Thank you for this issue. I currently spend very little time on this project, but I want to update it accordingly.