Bump the python group with 2 updates

Bumps the python group with 2 updates: [pydantic](https://github.com/pydantic/pydantic) and [pytest](https://github.com/pytest-dev/pytest).


Updates `pydantic` from 2.12.3 to 2.12.4
- [Release notes](https://github.com/pydantic/pydantic/releases)
- [Changelog](https://github.com/pydantic/pydantic/blob/v2.12.4/HISTORY.md)
- [Commits](pydantic/pydantic@v2.12.3...v2.12.4)

Updates `pytest` from 8.4.2 to 9.0.0
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@8.4.2...9.0.0)

---
updated-dependencies:
- dependency-name: pydantic
  dependency-version: 2.12.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: python
- dependency-name: pytest
  dependency-version: 9.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
  dependency-group: python
...

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

Author: dependabot[bot]

pyproject.toml

@@ -6,7 +6,7 @@ dependencies = [
     "click==8.3.0",
     "jinja2==3.1.6",
     "myst-parser==4.0.1",
-    "pydantic==2.12.3",
+    "pydantic==2.12.4",
     "requests==2.32.5",
     "sphinx-rtd-theme==3.0.2",
     "sphinx==8.2.3",
@@ -19,7 +19,7 @@ pyvec-docs = "pyvec_docs.cli:main"
 [dependency-groups]
 dev = [
     "pytest-ruff==0.5",
-    "pytest==8.4.2",
+    "pytest==9.0.0",
     "sphinx-autobuild==2025.8.25",
 ]