Bump pillow (kubeflow#2019)

Bumps [pillow](https://github.com/python-pillow/Pillow) from 6.2.0 to 9.0.0.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](python-pillow/Pillow@6.2.0...9.0.0)

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

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

docs/samples/v1beta1/transformer/torchserve_image_transformer/setup.py

@@ -33,7 +33,7 @@
         "kserve>=0.7.0rc0",
         "joblib>=0.13.2",
         "torchvision>=0.4.0",
-        "pillow==6.2.0"
+        "pillow==9.0.0"
     ],
     tests_require=tests_require,
     extras_require={'test': tests_require}