build(deps-dev): bump the dev-dependencies group across 1 directory with 2 updates

Bumps the dev-dependencies group with 2 updates in the / directory: [mypy](https://github.com/python/mypy) and [pytest](https://github.com/pytest-dev/pytest).


Updates `mypy` from 1.14.0 to 1.15.0
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.14.0...v1.15.0)

Updates `pytest` from 8.3.4 to 8.3.5
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@8.3.4...8.3.5)

---
updated-dependencies:
- dependency-name: mypy
  dependency-version: 1.15.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: dev-dependencies
- dependency-name: pytest
  dependency-version: 8.3.5
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: dev-dependencies
...

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Author: dependabot[bot]