Update pytest-asyncio requirement in the dependencies group (#515)

Updates the requirements on [pytest-asyncio](https://github.com/pytest-dev/pytest-asyncio) to permit the latest version.

Updates `pytest-asyncio` to 0.24.0
- [Release notes](https://github.com/pytest-dev/pytest-asyncio/releases)
- [Commits](pytest-dev/pytest-asyncio@v0.23.6...v0.24.0)

---
updated-dependencies:
- dependency-name: pytest-asyncio
  dependency-type: direct:production
  dependency-group: dependencies
...

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pyproject.toml

@@ -46,7 +46,7 @@ dev = [
     "optimade-gateway[docs]",
     "pre-commit~=3.7",
     "pytest~=8.2",
-    "pytest-asyncio~=0.23.6",
+    "pytest-asyncio~=0.24.0",
     "pytest-cov~=5.0",
     "pytest-httpx~=0.30.0",
 ]