Bump the python group with 2 updates

Updates the requirements on [pytest](https://github.com/pytest-dev/pytest) and [uv-build](https://github.com/astral-sh/uv) to permit the latest version.

Updates `pytest` 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](pytest-dev/pytest@9.0.3...9.1.0)

Updates `uv-build` to 0.11.21
- [Release notes](https://github.com/astral-sh/uv/releases)
- [Changelog](https://github.com/astral-sh/uv/blob/main/CHANGELOG.md)
- [Commits](astral-sh/uv@0.11.19...0.11.21)

---
updated-dependencies:
- dependency-name: pytest
  dependency-version: 9.1.0
  dependency-type: direct:development
  dependency-group: python
- dependency-name: uv-build
  dependency-version: 0.11.21
  dependency-type: direct:development
  dependency-group: python
...

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

Author: dependabot[bot]

pyproject.toml

@@ -19,12 +19,12 @@ pyvec-docs = "pyvec_docs.cli:main"
 [dependency-groups]
 dev = [
     "pytest-ruff>=0.5",
-    "pytest>=9.0.3",
+    "pytest>=9.1.0",
     "sphinx-autobuild>=2025.8.25",
 ]
 
 [build-system]
-requires = ["uv_build>=0.11.19,<0.12.0"]
+requires = ["uv_build>=0.11.21,<0.12.0"]
 build-backend = "uv_build"
 
 [tool.pytest.ini_options]