pwn-qemu-kernel: fix qemu n-day

[ecomaikgolf]

Fix https://kqx.io/post/qemu-nday/ by using Fedora 43 as base image.

Maybe we want to use rawhide. Or something else, I used Fedora as I new it would have a fresh version. I tried RHEL Ubi images but it did not have half of the packages.

This is one of the cases where we might not want to lock the repository packages, as we want qemu to update.

bash-5.3$ qemu-system-x86_64 --version
QEMU emulator version 10.1.2 (qemu-10.1.2-1.fc43)
Copyright (c) 2003-2025 Fabrice Bellard and the QEMU Project developers

Makes sense to use always latest qemu, the container is privileged, we also dont want anything else to be found and get a escape.

[csskevin]

Running make test outputs

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Also the version updates are missing in .versions and README.md

[ecomaikgolf]

This seems unrelated to the PR. We had the same issue before, that with docker on your system the key is missing for whatever reason.

I can double check later but it passes for me.

The .version is true, gotta change that before merging