build(deps): bump ipython from 7.25.0 to 7.26.0 (#592)

Bumps [ipython](https://github.com/ipython/ipython) from 7.25.0 to 7.26.0.
- [Release notes](https://github.com/ipython/ipython/releases)
- [Commits](ipython/ipython@7.25.0...7.26.0)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements-docs.txt

@@ -1,4 +1,4 @@
-ipython==7.25.0
+ipython==7.26.0
 Sphinx==4.1.2
 sphinxcontrib-fulltoc==1.2.0
 nbsphinx==0.8.6