chore: bump the dev-dependencies group across 1 directory with 3 updates

Bumps the dev-dependencies group with 3 updates in the / directory: [pytest](https://github.com/pytest-dev/pytest), [mypy](https://github.com/python/mypy) and [ruff](https://github.com/astral-sh/ruff).


Updates `pytest` from 9.0.3 to 9.1.0
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@9.0.3...9.1.0)

Updates `mypy` from 2.0.0 to 2.1.0
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v2.0.0...v2.1.0)

Updates `ruff` from 0.15.12 to 0.15.18
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@0.15.12...0.15.18)

---
updated-dependencies:
- dependency-name: pytest
  dependency-version: 9.1.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: dev-dependencies
- dependency-name: mypy
  dependency-version: 2.1.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: dev-dependencies
- dependency-name: ruff
  dependency-version: 0.15.18
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: dev-dependencies
...

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

Author: dependabot[bot]

pyproject.toml

@@ -41,10 +41,10 @@ docs = [
 ]
 dev = [
     {include-group = "docs"},
-    "pytest==9.0.3",
+    "pytest==9.1.0",
     "pytest-cov==7.1.0",
-    "mypy==2.0.0",
-    "ruff==0.15.12",
+    "mypy==2.1.0",
+    "ruff==0.15.18",
     "pre-commit==4.6.0",
     "nbstripout==0.9.1",
 ]