Bump nbconvert from 6.5.3 to 7.16.4

Bumps [nbconvert](https://github.com/jupyter/nbconvert) from 6.5.3 to 7.16.4.
- [Release notes](https://github.com/jupyter/nbconvert/releases)
- [Changelog](https://github.com/jupyter/nbconvert/blob/main/CHANGELOG.md)
- [Commits](jupyter/nbconvert@6.5.3...v7.16.4)

environment.yml

@@ -45,7 +45,7 @@ dependencies:
 #  - jupyterlab-plotly~=5.18.0 # Outdated accoring to jupyterlab
   - jupyterlab_pygments~=0.3.0 # To bring extension uptodate
   - jupytext~=1.16.1
-  - nbconvert==6.5.3
+  - nbconvert~=7.16
   - nbdime~=4.0.1
   # JupyterBook Addons
   - sphinxcontrib-bibtex