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

@@ -46,7 +46,7 @@ doc = [
     "ansys-sphinx-theme==1.2.3",
     "autodoc_pydantic==2.1.0",
     "jupyter_sphinx==0.5.3",
-    "nbsphinx==0.9.5",
+    "nbsphinx==0.9.6",
     "numpydoc==1.8.0",
     "myst-parser==4.0.0",
     "Sphinx==8.1.3",