chardet 6.0.0 was just released, but requests only supports < 6.

This just broke our CI with:

/opt/hostedtoolcache/Python/3.12.12/x64/lib/python3.12/site-packages/requests/__init__.py:113:

RequestsDependencyWarning: urllib3 (2.6.3) or chardet (6.0.0dev0)/charset_normalizer (3.4.4) doesn't match a supported version!\n"

I also reported that strange "dev0" to the chardet project, that shouldn't be there when just doing "pip install chardet".

CI log: https://github.com/borgbackup/borg/actions/runs/22275930673/job/64439274108?pr=9397

Reproduction Steps

Not sure, we do not directly use requests, it is just pulled in by some stuff we use.

And something installs the latest chardet and requests stumbles over it, spilling out unexpected output on stderr.