Bump nbformat from 5.0.8 to 5.10.4

Bumps [nbformat](https://github.com/jupyter/nbformat) from 5.0.8 to 5.10.4.
- [Release notes](https://github.com/jupyter/nbformat/releases)
- [Changelog](https://github.com/jupyter/nbformat/blob/main/CHANGELOG.md)
- [Commits](jupyter/nbformat@5.0.8...v5.10.4)

---
updated-dependencies:
- dependency-name: nbformat
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Otherfiles/doc-requirements.txt

@@ -1,6 +1,6 @@
 art==6.2
 notebook==5.7.4
-nbformat==5.0.8
+nbformat==5.10.4
 traitlets==4.3.3
 nbconvert==5.6.1
 jupyter_contrib_nbextensions==0.5.1