build(deps): Bump the pip-version group with 1 update

Bumps the pip-version group with 1 update: [cython](https://github.com/cython/cython).


Updates `cython` from 3.0.8 to 3.0.9
- [Release notes](https://github.com/cython/cython/releases)
- [Changelog](https://github.com/cython/cython/blob/master/CHANGES.rst)
- [Commits](cython/cython@3.0.8...3.0.9)

---
updated-dependencies:
- dependency-name: cython
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: pip-version
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements/requirements-test.txt

@@ -1,7 +1,7 @@
 ase==3.22.1
 cmake==3.28.3
 coverage==7.4.3
-cython==3.0.8
+cython==3.0.9
 dynasor==1.1.1; platform_system != "Windows"
 GitPython==3.1.42
 gsd==3.2.1