Bump pyyaml dependency to fix failing dependencies install

[MatteoPologruto]

Bumped the pyyaml dependency and generated the lock file with poetry update pyyaml. This shoud fix issues related to dependencies installation like the following one:

at /Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/poetry/installation/chef.py:164 in _prepare
      160│ 
      161│                 error = ChefBuildError("\n\n".join(message_parts))
      162│ 
      163│             if error is not None:
    → 164│                 raise error from None
      165│ 
      166│             return path
      167│ 
      168│     def _prepare_sdist(self, archive: Path, destination: Path | None = None) -> Path:

Note: This error originates from the build backend, and is likely not a problem with poetry but with pyyaml (5.4.1) not supporting PEP 517 builds. You can verify this by running 'pip wheel --no-cache-dir --use-pep517 "pyyaml (==5.4.1)"'.

[MatteoPologruto]

The failing workflow runs are unrelated to the changes. See editorconfig-checker/editorconfig-checker#409

[per1234]

The package should not be added as a dependency, since it is only a transitive dependency.

Instead, it should only be updated, which can be done by running the following command:

poetry update pyyaml

and then checking in the resulting change to poetry.lock.

[per1234]

Thanks Matteo!