Bump nglview from 3.0.7 to 3.0.8

Bumps [nglview](https://github.com/arose/nglview) from 3.0.7 to 3.0.8.
- [Release notes](https://github.com/arose/nglview/releases)
- [Changelog](https://github.com/nglviewer/nglview/blob/master/CHANGELOG.md)
- [Commits](nglviewer/nglview@v3.0.7...v3.0.8)

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

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

requirements/requirements-test.txt

@@ -1,4 +1,4 @@
 numpy==1.25.2
 matplotlib==3.8.0
 scikit-learn==1.3
-nglview==3.0.7
+nglview==3.0.8