build(deps): update ipython[notebook] requirement in /requirements

Updates the requirements on [ipython[notebook]](https://github.com/ipython/ipython) to permit the latest version.
- [Release notes](https://github.com/ipython/ipython/releases)
- [Commits](ipython/ipython@rel-0.8.4...8.18.1)

---
updated-dependencies:
- dependency-name: ipython[notebook]
  dependency-version: 8.18.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements/pytorch/docs.txt

@@ -1,7 +1,7 @@
 -r ../docs.txt
 
 nbformat  # used for generate empty notebook
-ipython[notebook] <8.7.0
+ipython[notebook] <8.19.0
 setuptools<58.0  # workaround for `error in ipython setup command: use_2to3 is invalid.`
 
 #-r ../../_notebooks/.actions/requires.txt