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@v0.23.7...v0.23.8)

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

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

requirements-test.txt

@@ -1,5 +1,5 @@
 # Testing toolchain
 pytest>=7.1.1
-pytest-asyncio~=0.23.7
+pytest-asyncio~=0.23.8
 pytest-cov>=3.0.0
 pytest-xdist>=2.5.0