Update pytest-asyncio requirement in the dependencies group

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

Updates `pytest-asyncio` to 0.25.0
- [Release notes](https://github.com/pytest-dev/pytest-asyncio/releases)
- [Commits](pytest-dev/pytest-asyncio@v0.24.0...v0.25.0)

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

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

pyproject.toml

@@ -46,7 +46,7 @@ dev = [
     "optimade-gateway[docs]",
     "pre-commit~=4.0",
     "pytest~=8.2",
-    "pytest-asyncio~=0.24.0",
+    "pytest-asyncio~=0.25.0",
     "pytest-cov~=6.0",
     "pytest-httpx~=0.35.0",
 ]