Bump pytest from 9.0.3 to 9.1.0 in /python

Bumps [pytest](https://github.com/pytest-dev/pytest) from 9.0.3 to 9.1.0.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/9.0.3...9.1.0)

---
updated-dependencies:
- dependency-name: pytest
  dependency-version: 9.1.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

python/pyproject.toml

@@ -31,7 +31,7 @@ dev = [
     "uv==0.11.17",
     "flit==3.12.0",
     "ruff==0.15.15",
-    "pytest==9.0.3",
+    "pytest==9.1.0",
     "pytest-asyncio==1.4.0",
     "pytest-cov==7.1.0",
     "pytest-xdist[psutil]==3.8.0",