Bump pillow from 9.3.0 to 9.4.0

Bumps [pillow](https://github.com/python-pillow/Pillow) from 9.3.0 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](https://github.com/python-pillow/Pillow/compare/9.3.0...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

@@ -14,7 +14,7 @@ bleach-allowlist==1.0.3
 gunicorn==20.1.0
 lxml==4.9.2
 Markdown==3.4.1
-Pillow==9.3.0
+Pillow==9.4.0
 psycopg2-binary==2.9.5
 python-dotenv==0.21.0
 requests==2.28.1