fix: pin version of pyworld to 0.2.12

[sjrl]

Related Issues

• fixes Audio install of Haystack on M2 Macbook fails with Python 3.9 #3046

Proposed Changes:

Pins pyworld to version <=0.2.12 so that it does not pin numpy to <1.20.0 in its pyproject.toml

How did you test it?

I created a new python 3.9 environment and ran GRPC_PYTHON_BUILD_SYSTEM_ZLIB=true pip install -e '.[audio]' to check for a successful installation.

Notes for the reviewer

Checklist

• I have read the contributors guidelines and the code of conduct
• I have updated the related issue with new insights and changes
• I added tests that demonstrate the correct behavior of the change
• I've used the conventional commit convention for my PR title
• I documented my code
• I ran pre-commit hooks and fixed any issue

[masci]

Makes sense 👍