deps(deps-dev): bump the python-development group with 2 updates

Bumps the python-development group with 2 updates: [ruff](https://github.com/astral-sh/ruff) and [types-openpyxl](https://github.com/typeshed-internal/stub_uploader).


Updates `ruff` from 0.15.5 to 0.15.6
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@0.15.5...0.15.6)

Updates `types-openpyxl` from 3.1.5.20250919 to 3.1.5.20260316
- [Commits](https://github.com/typeshed-internal/stub_uploader/commits)

---
updated-dependencies:
- dependency-name: ruff
  dependency-version: 0.15.6
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: python-development
- dependency-name: types-openpyxl
  dependency-version: 3.1.5.20260316
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: python-development
...

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Author: dependabot[bot]