fix(config): read using utf-8

[AmaseCocoa]

Change Summary

Changed path.read_text to explicitly use utf-8 to avoid UnicodeEncodeError that may be caused by cp932 in Japanese Windows environments.

src/prisma/_config.py and tests/test_config.py was changed.

(This is my first time contributing to another repository, so there may be some clumsiness, but I'd appreciate it if you could let me know if that's the case.)

Checklist

• Unit tests for the changes exist
• Tests pass without significant drop in coverage
• Documentation reflects changes where applicable
• Test snapshots have been updated if applicable

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[RobertCraigie]

Thanks for the PR!

It'd be great if you could add a unit test for this case to tests/test_config.py. We have some existing tests for config loading there which you can take inspiration from :)

[AmaseCocoa]

Added Unit Test (test_with_file) to tests/test_config.py :)