docs: update rich.reconfigure docstring

[willfrey]

Type of changes

• Bug fix
• New feature
• Documentation / docstrings
• Tests
• Other

Checklist

• I've run the latest black with default args on new code.
• I've updated CHANGELOG.md and CONTRIBUTORS.md where appropriate.
• I've added tests for new code.
• I accept that @willmcgugan may be pedantic in the code review.

Description

Update the docstring for rich.reconfigure. Previously, the docstring said it would accept an instance of rich.console.Console, but it expects positional and keyword arguments that are forward to the initializer for rich.console.Console.

[willfrey]

I didn't see any mentions of docstring changes in CHANGELOG.md, so I've intentionally not updated those since this is a small, cosmetic change. If you want me to update them, just say the word and I'll add it to this PR.

[willmcgugan]

Thanks