Update pytest-asyncio requirement from <=0.23.7 to <=0.23.8

Updates the requirements on [pytest-asyncio](https://github.com/pytest-dev/pytest-asyncio) to permit the latest version.
- [Release notes](https://github.com/pytest-dev/pytest-asyncio/releases)
- [Commits](pytest-dev/pytest-asyncio@v0.1.1...v0.23.8)

---
updated-dependencies:
- dependency-name: pytest-asyncio
  dependency-type: direct:development
...

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

dev-requirements.txt

@@ -21,5 +21,5 @@ twine
 
 # Requirements for testing [async] extra
 aiohttp>=3.9.4, <4
-pytest-asyncio<=0.23.7
+pytest-asyncio<=0.23.8
 unasync