Bump the minor group with 2 updates

Bumps the minor group with 2 updates: [mkdocs-material](https://github.com/squidfunk/mkdocs-material) and [mypy](https://github.com/python/mypy).


Updates `mkdocs-material` from 9.6.21 to 9.7.3
- [Release notes](https://github.com/squidfunk/mkdocs-material/releases)
- [Changelog](https://github.com/squidfunk/mkdocs-material/blob/master/CHANGELOG)
- [Commits](squidfunk/mkdocs-material@9.6.21...9.7.3)

Updates `mypy` from 1.18.2 to 1.19.1
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.18.2...v1.19.1)

---
updated-dependencies:
- dependency-name: mkdocs-material
  dependency-version: 9.7.3
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: minor
- dependency-name: mypy
  dependency-version: 1.19.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: minor
...

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

Author: dependabot[bot]

pyproject.toml

@@ -61,12 +61,12 @@ dev-mkdocs = [
   "mike == 1.1.2",
   "mkdocs-gen-files == 0.5.0",
   "mkdocs-literate-nav == 0.6.2",
-  "mkdocs-material == 9.6.21",
+  "mkdocs-material == 9.7.6",
   "mkdocstrings[python] == 0.30.1",
   "frequenz-repo-config[api] == 0.14.0",
 ]
 dev-mypy = [
-  "mypy == 1.18.2",
+  "mypy == 1.19.1",
   "grpc-stubs == 1.53.0.6",
   # For checking the noxfile, docs/ script, and tests
   "frequenz-api-common[dev-mkdocs,dev-noxfile,dev-pytest]",