chore(deps): bump maturin from 1.9.5 to 1.9.6 in /docs (apache#18039)

Bumps [maturin](https://github.com/pyo3/maturin) from 1.9.5 to 1.9.6.
- [Release notes](https://github.com/pyo3/maturin/releases)
- [Changelog](https://github.com/PyO3/maturin/blob/main/Changelog.md)
- [Commits](PyO3/maturin@v1.9.5...v1.9.6)

---
updated-dependencies:
- dependency-name: maturin
  dependency-version: 1.9.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

docs/requirements.txt

@@ -19,6 +19,6 @@ sphinx==8.2.3
 sphinx-reredirects==1.0.0
 pydata-sphinx-theme==0.8.0
 myst-parser==4.0.1
-maturin==1.9.5
+maturin==1.9.6
 jinja2==3.1.6
 setuptools==80.9.0