Bump pillow from 9.2.0 to 9.3.0 in /utils/dicom_converter (#5319)

Bumps [pillow](https://github.com/python-pillow/Pillow) from 9.2.0 to 9.3.0.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](https://github.com/python-pillow/Pillow/compare/9.2.0...9.3.0)

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

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utils/dicom_converter/requirements.txt

@@ -1,4 +1,4 @@
 numpy==1.22.0
-Pillow==9.2.0
+Pillow==9.3.0
 pydicom==2.1.2
 tqdm==4.60.0