Bump pillow from 9.0.0 to 9.4.0

Bumps [pillow](https://github.com/python-pillow/Pillow) from 9.0.0 to 9.4.0.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](python-pillow/Pillow@9.0.0...9.4.0)

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

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

requirements.txt

@@ -1,5 +1,5 @@
 # native dependencies
-Pillow==9.0.0
+Pillow==9.4.0
 lxml==4.7.1
 psycopg2==2.9.3
 Django==3.2.12