Bump the development-dependencies group across 1 directory with 9 updates

Bumps the development-dependencies group with 9 updates in the / directory:

| Package | From | To |
| --- | --- | --- |
| [pytest](https://github.com/pytest-dev/pytest) | `8.4.2` | `9.0.3` |
| [mypy](https://github.com/python/mypy) | `1.19.1` | `1.20.2` |
| [pre-commit](https://github.com/pre-commit/pre-commit) | `4.5.1` | `4.6.0` |
| [pytest-cov](https://github.com/pytest-dev/pytest-cov) | `6.3.0` | `7.1.0` |
| [ruff](https://github.com/astral-sh/ruff) | `0.15.7` | `0.15.12` |
| [furo](https://github.com/pradyunsg/furo) | `2024.8.6` | `2025.12.19` |
| [myst-parser](https://github.com/executablebooks/MyST-Parser) | `2.0.0` | `4.0.1` |
| [sphinx-design](https://github.com/executablebooks/sphinx-design) | `0.5.0` | `0.6.1` |
| [ipykernel](https://github.com/ipython/ipykernel) | `6.31.0` | `7.2.0` |



Updates `pytest` from 8.4.2 to 9.0.3
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@8.4.2...9.0.3)

Updates `mypy` from 1.19.1 to 1.20.2
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.19.1...v1.20.2)

Updates `pre-commit` from 4.5.1 to 4.6.0
- [Release notes](https://github.com/pre-commit/pre-commit/releases)
- [Changelog](https://github.com/pre-commit/pre-commit/blob/main/CHANGELOG.md)
- [Commits](pre-commit/pre-commit@v4.5.1...v4.6.0)

Updates `pytest-cov` from 6.3.0 to 7.1.0
- [Changelog](https://github.com/pytest-dev/pytest-cov/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-cov@v6.3.0...v7.1.0)

Updates `ruff` from 0.15.7 to 0.15.12
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@0.15.7...0.15.12)

Updates `furo` from 2024.8.6 to 2025.12.19
- [Release notes](https://github.com/pradyunsg/furo/releases)
- [Changelog](https://github.com/pradyunsg/furo/blob/main/docs/changelog.md)
- [Commits](pradyunsg/furo@2024.08.06...2025.12.19)

Updates `myst-parser` from 2.0.0 to 4.0.1
- [Release notes](https://github.com/executablebooks/MyST-Parser/releases)
- [Changelog](https://github.com/executablebooks/MyST-Parser/blob/master/CHANGELOG.md)
- [Commits](executablebooks/MyST-Parser@v2.0.0...v4.0.1)

Updates `sphinx-design` from 0.5.0 to 0.6.1
- [Release notes](https://github.com/executablebooks/sphinx-design/releases)
- [Changelog](https://github.com/executablebooks/sphinx-design/blob/main/CHANGELOG.md)
- [Commits](executablebooks/sphinx-design@v0.5.0...v0.6.1)

Updates `ipykernel` from 6.31.0 to 7.2.0
- [Release notes](https://github.com/ipython/ipykernel/releases)
- [Changelog](https://github.com/ipython/ipykernel/blob/main/CHANGELOG.md)
- [Commits](ipython/ipykernel@v6.31.0...v7.2.0)

---
updated-dependencies:
- dependency-name: pytest
  dependency-version: 9.0.3
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: development-dependencies
- dependency-name: mypy
  dependency-version: 1.20.2
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: development-dependencies
- dependency-name: pre-commit
  dependency-version: 4.6.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: development-dependencies
- dependency-name: pytest-cov
  dependency-version: 7.1.0
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: development-dependencies
- dependency-name: ruff
  dependency-version: 0.15.12
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: development-dependencies
- dependency-name: furo
  dependency-version: 2025.12.19
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: development-dependencies
- dependency-name: myst-parser
  dependency-version: 4.0.1
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: development-dependencies
- dependency-name: sphinx-design
  dependency-version: 0.6.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: development-dependencies
- dependency-name: ipykernel
  dependency-version: 7.2.0
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: development-dependencies
...

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Author: dependabot[bot]