Deps: Bump the python-packages group with 3 updates

Bumps the python-packages group with 3 updates: [coverage](https://github.com/nedbat/coveragepy), [certifi](https://github.com/certifi/python-certifi) and [typing-extensions](https://github.com/python/typing_extensions).


Updates `coverage` from 7.8.2 to 7.9.1
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](coveragepy/coveragepy@7.8.2...7.9.1)

Updates `certifi` from 2025.4.26 to 2025.6.15
- [Commits](certifi/python-certifi@2025.04.26...2025.06.15)

Updates `typing-extensions` from 4.13.2 to 4.14.0
- [Release notes](https://github.com/python/typing_extensions/releases)
- [Changelog](https://github.com/python/typing_extensions/blob/main/CHANGELOG.md)
- [Commits](python/typing_extensions@4.13.2...4.14.0)

---
updated-dependencies:
- dependency-name: coverage
  dependency-version: 7.9.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: python-packages
- dependency-name: certifi
  dependency-version: 2025.6.15
  dependency-type: indirect
  update-type: version-update:semver-minor
  dependency-group: python-packages
- dependency-name: typing-extensions
  dependency-version: 4.14.0
  dependency-type: indirect
  update-type: version-update:semver-minor
  dependency-group: python-packages
...

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

Author: dependabot[bot]