Bump notebook from 5.7.4 to 6.4.12 in /Otherfiles

Bumps [notebook](https://github.com/jupyter/notebook) from 5.7.4 to 6.4.12.
- [Release notes](https://github.com/jupyter/notebook/releases)
- [Changelog](https://github.com/jupyter/notebook/blob/main/CHANGELOG.md)
- [Commits](jupyter/notebook@5.7.4...6.4.12)

---
updated-dependencies:
- dependency-name: notebook
  dependency-type: direct:production
...

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

Otherfiles/doc-requirements.txt

@@ -1,5 +1,5 @@
 art==6.3
-notebook==5.7.4
+notebook==6.4.12
 nbformat==5.0.8
 traitlets==4.3.3
 nbconvert==5.6.1