Bump pillow from 8.4.0 to 9.0.0

Bumps [pillow](https://github.com/python-pillow/Pillow) from 8.4.0 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@8.4.0...9.0.0)

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

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

requirements.txt

@@ -3,7 +3,7 @@ elfinder-client==2.1.55a6
 fastapi==0.71.0
 jinja2==3.0.3
 pathvalidate==2.5.0
-pillow==8.4.0
+pillow==9.0.0
 python-dotenv==0.19.2
 python-multipart==0.0.5
 typing_extensions==4.0.1