set PYTHONIOENCODING to utf-8 in snapcraft.yaml for subiquity{,-service}
set PYTHONIOENCODING to utf-8 in snapcraft.yaml for subiquity{,-service}

for https://bugs.launchpad.net/ubuntu-z-systems/+bug/1884027

Not really sure why this only shows up now.

CanonicalLtd/subiquity,CanonicalLtd/subiquity