Bump pytest-asyncio from 1.3.0 to 1.4.0

Bumps [pytest-asyncio](https://github.com/pytest-dev/pytest-asyncio) from 1.3.0 to 1.4.0.
- [Release notes](https://github.com/pytest-dev/pytest-asyncio/releases)
- [Commits](pytest-dev/pytest-asyncio@v1.3.0...v1.4.0)

---
updated-dependencies:
- dependency-name: pytest-asyncio
  dependency-version: 1.4.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pyproject.toml

@@ -102,7 +102,7 @@ dev-pytest = [
   "pytest == 9.0.3",
   "frequenz-repo-config[extra-lint-examples] == 0.17.0",
   "pytest-mock == 3.15.1",
-  "pytest-asyncio == 1.3.0",
+  "pytest-asyncio == 1.4.0",
   "async-solipsism == 0.9",
   "time-machine == 3.2.0",
   "hypothesis == 6.152.4",