Add Python 3.11 wheels, drop Python 3.6 support (take 2)

What's Changed

• Fix release pipeline by @graebm in #404
• Update doc style to wrap long text in table of context by @xiazhvera in #401
• Added Raspberry CI support by @xiazhvera in #399
• Drop support for Python 3.6, add wheels for Python 3.11 by @graebm in #402

New Contributors

• @xiazhvera made their first contribution in #401

Full Changelog: v0.14.7...v0.15.1