Bump pillow from 8.3.2 to 9.0.0 in /server

Bumps [pillow](https://github.com/python-pillow/Pillow) from 8.3.2 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@8.3.2...9.0.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

server/requirements.txt

@@ -11,7 +11,7 @@ flask-oidc-ext==1.4.3
 numpy==1.19.4
 object_detection-0.1_2.5.0.tar.gz
 opencv-contrib-python-headless==4.5.2.54
-Pillow==8.3.2
+Pillow==9.0.0
 protobuf==3.17.3
 psutil==5.8.0
 python-dateutil==2.8.1