Bump nbsphinx from 0.9.5 to 0.9.6

Bumps [nbsphinx](https://github.com/spatialaudio/nbsphinx) from 0.9.5 to 0.9.6.
- [Release notes](https://github.com/spatialaudio/nbsphinx/releases)
- [Changelog](https://github.com/spatialaudio/nbsphinx/blob/master/NEWS.rst)
- [Commits](spatialaudio/nbsphinx@0.9.5...0.9.6)

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

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

pyproject.toml

@@ -56,7 +56,7 @@ docs = [
     "furo==2024.8.6",
     "sphinx-autodoc-typehints==2.5.0",
     "myst_parser==4.0.0",
-    "nbsphinx==0.9.5",
+    "nbsphinx==0.9.6",
     "nbsphinx-link==1.3.1",
     "ipython==8.30.0",
     "docutils==0.20.1",