Awesome! I have, after LITERALLY weeks of trying, managed to get my Win 11 WSL to upgrade both the WSL version *and* the version of Ubuntu it is running.
I totally get that for most people this was a few minutes work with no issues. I did not have that pleasure.
It took me a long time to realise that even though I thought it was running with the right privs, it wasn't. As you can imagine, if I couldn't get that working, the rest was a car crash.