Bump nbconvert from 7.16.3 to 7.16.4

Bumps [nbconvert](https://github.com/jupyter/nbconvert) from 7.16.3 to 7.16.4.
- [Release notes](https://github.com/jupyter/nbconvert/releases)
- [Changelog](https://github.com/jupyter/nbconvert/blob/main/CHANGELOG.md)
- [Commits](https://github.com/jupyter/nbconvert/compare/v7.16.3...v7.16.4)

---
updated-dependencies:
- dependency-name: nbconvert
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

requirements-dev.txt

@@ -21,7 +21,7 @@ isort==5.13.2
 time-machine==2.14.1
 
 # Convert jupyter notebooks to markdown documents
-nbconvert==7.16.3
+nbconvert==7.16.4
 
 # mypy types
 types-cachetools==5.3.0.7