Bump ipython in /docs/samples/explanation/aix/mnist (kubeflow#2017)

Bumps [ipython](https://github.com/ipython/ipython) from 7.13.0 to 7.16.3.
- [Release notes](https://github.com/ipython/ipython/releases)
- [Commits](ipython/ipython@7.13.0...7.16.3)

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

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

docs/samples/explanation/aix/mnist/requirements.txt

@@ -28,7 +28,7 @@ image==1.5.28
 imageio==2.8.0
 importlib-metadata==1.6.0
 ipykernel==5.2.0
-ipython==7.13.0
+ipython==7.16.3
 ipython-genutils==0.2.0
 jedi==0.16.0
 Jinja2==2.11.1