Code review comment for ~paelzer/ubuntu/+source/qemu:ubuntu-eoan-4.0

Regression test spotted:
Disco -> Eoan:
error: operation failed: guest CPU doesn't match specification: missing features: md-clear
echo '><failure type='\''BuildFailure'\''>machine types not unique</failure></testcase>'

But this is what I already fixed and should be gone on a retry.
No other known issues left, restarting the automated regression check.