Bump the minor group with 6 updates

Bumps the minor group with 6 updates:

| Package | From | To |
| --- | --- | --- |
| [black](https://github.com/psf/black) | `25.1.0` | `25.9.0` |
| [markdown](https://github.com/Python-Markdown/markdown) | `3.8.2` | `3.9` |
| [mkdocs-macros-plugin](https://github.com/fralau/mkdocs_macros_plugin) | `1.3.9` | `1.4.0` |
| [mypy](https://github.com/python/mypy) | `1.17.1` | `1.18.2` |
| [types-markdown](https://github.com/typeshed-internal/stub_uploader) | `3.8.0.20250809` | `3.9.0.20250906` |
| [pytest-mock](https://github.com/pytest-dev/pytest-mock) | `3.14.1` | `3.15.1` |


Updates `black` from 25.1.0 to 25.9.0
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](psf/black@25.1.0...25.9.0)

Updates `markdown` from 3.8.2 to 3.9
- [Release notes](https://github.com/Python-Markdown/markdown/releases)
- [Changelog](https://github.com/Python-Markdown/markdown/blob/master/docs/changelog.md)
- [Commits](Python-Markdown/markdown@3.8.2...3.9.0)

Updates `mkdocs-macros-plugin` from 1.3.9 to 1.4.0
- [Release notes](https://github.com/fralau/mkdocs_macros_plugin/releases)
- [Changelog](https://github.com/fralau/mkdocs-macros-plugin/blob/master/CHANGELOG.md)
- [Commits](fralau/mkdocs-macros-plugin@v1.3.9...v1.4.0)

Updates `mypy` from 1.17.1 to 1.18.2
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.17.1...v1.18.2)

Updates `types-markdown` from 3.8.0.20250809 to 3.9.0.20250906
- [Commits](https://github.com/typeshed-internal/stub_uploader/commits)

Updates `pytest-mock` from 3.14.1 to 3.15.1
- [Release notes](https://github.com/pytest-dev/pytest-mock/releases)
- [Changelog](https://github.com/pytest-dev/pytest-mock/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-mock@v3.14.1...v3.15.1)

---
updated-dependencies:
- dependency-name: black
  dependency-version: 25.9.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: minor
- dependency-name: markdown
  dependency-version: '3.9'
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: minor
- dependency-name: mkdocs-macros-plugin
  dependency-version: 1.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: minor
- dependency-name: mypy
  dependency-version: 1.18.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: minor
- dependency-name: types-markdown
  dependency-version: 3.9.0.20250906
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: minor
- dependency-name: pytest-mock
  dependency-version: 3.15.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pyproject.toml

@@ -57,24 +57,24 @@ dev-flake8 = [
   "pydoclint == 0.7.3",
   "pydocstyle == 6.3.0",
 ]
-dev-formatting = ["black == 25.1.0", "isort == 6.0.1"]
+dev-formatting = ["black == 25.9.0", "isort == 6.0.1"]
 dev-mkdocs = [
-  "black == 25.1.0",
-  "Markdown==3.8.2",
+  "black == 25.9.0",
+  "Markdown==3.9",
   "mike == 2.1.3",
   "mkdocs-gen-files == 0.5.0",
   "mkdocs-literate-nav == 0.6.2",
-  "mkdocs-macros-plugin == 1.3.9",
+  "mkdocs-macros-plugin == 1.4.0",
   "mkdocs-material == 9.6.21",
   "mkdocstrings[python] == 0.30.1",
   "mkdocstrings-python == 1.18.2",
   "frequenz-repo-config[lib] == 0.13.5",
 ]
 dev-mypy = [
-  "mypy == 1.17.1",
+  "mypy == 1.18.2",
   # This dependency introduces breaking changes in patch releases
   "grpc-stubs == 1.53.0.6",
-  "types-Markdown == 3.8.0.20250809",
+  "types-Markdown == 3.9.0.20250906",
   # For checking the noxfile, docs/ script, and tests
   "frequenz-dispatch[dev-mkdocs,dev-noxfile,dev-pytest]",
 ]
@@ -91,7 +91,7 @@ dev-pylint = [
 dev-pytest = [
   "pytest == 8.4.2",
   "frequenz-repo-config[extra-lint-examples] == 0.13.5",
-  "pytest-mock == 3.14.1",
+  "pytest-mock == 3.15.1",
   "pytest-asyncio == 1.2.0",
   "async-solipsism == 0.8",
   "time-machine == 2.19.0",