Bump pillow in /CONTENT/PYTHON/PythonDataScienceHandbook

Bumps [pillow](https://github.com/python-pillow/Pillow) from 3.4.2 to 9.0.1.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](python-pillow/Pillow@3.4.2...9.0.1)

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

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

CONTENT/PYTHON/PythonDataScienceHandbook/requirements.txt

@@ -3,7 +3,7 @@ pandas==0.18.1
 scipy==0.17.1
 scikit-learn==1.0.1
 scikit-image==0.12.3
-pillow==3.4.2
+pillow==9.0.1
 matplotlib==1.5.1
 seaborn==0.7.0
 jupyter