build(deps-dev): bump pytest-asyncio from 0.25.3 to 0.26.0 in /clients/python (kubeflow#929)

Bumps [pytest-asyncio](https://github.com/pytest-dev/pytest-asyncio) from 0.25.3 to 0.26.0.
- [Release notes](https://github.com/pytest-dev/pytest-asyncio/releases)
- [Commits](pytest-dev/pytest-asyncio@v0.25.3...v0.26.0)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

clients/python/poetry.lock

@@ -51,7 +51,7 @@ ruff = ">=0.5.2,<0.12.0"
 mypy = "^1.7.0"
 ray = "^2.43.0"
 uvloop = "^0.21.0"
-pytest-asyncio = ">=0.23.7,<0.26.0"
+pytest-asyncio = ">=0.23.7,<0.27.0"
 requests = "^2.32.2"
 black = ">=24.4.2,<26.0.0"
 types-python-dateutil = "^2.9.0.20240906"