Bump the dev-dependencies group across 1 directory with 4 updates

Bumps the dev-dependencies group with 4 updates in the / directory: [black](https://github.com/psf/black), [ruff](https://github.com/astral-sh/ruff), [pytest](https://github.com/pytest-dev/pytest) and [pytest-cov](https://github.com/pytest-dev/pytest-cov).


Updates `black` from 24.4.2 to 25.1.0
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](psf/black@24.4.2...25.1.0)

Updates `ruff` from 0.4.2 to 0.9.4
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@v0.4.2...0.9.4)

Updates `pytest` from 8.2.0 to 8.3.4
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@8.2.0...8.3.4)

Updates `pytest-cov` from 5.0.0 to 6.0.0
- [Changelog](https://github.com/pytest-dev/pytest-cov/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-cov@v5.0.0...v6.0.0)

---
updated-dependencies:
- dependency-name: black
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: dev-dependencies
- dependency-name: ruff
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: dev-dependencies
- dependency-name: pytest
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: dev-dependencies
- dependency-name: pytest-cov
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: dev-dependencies
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements-dev.txt

@@ -1,3 +1,3 @@
 bump2version==1.0.1
-black==24.4.2
-ruff==0.4.2
+black==25.1.0
+ruff==0.9.10

requirements.txt

@@ -16,8 +16,8 @@ fasttext==0.9.2
 pika==1.3.2
 
 # Development
-pytest==8.2.0
-pytest-cov==5.0.0
+pytest==8.3.5
+pytest-cov==6.0.0
 click==8.1.7
 
 # File format support