Bump pillow from 11.1.0 to 12.2.0 in /demo

Bumps [pillow](https://github.com/python-pillow/Pillow) from 11.1.0 to 12.2.0.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](python-pillow/Pillow@11.1.0...12.2.0)

---
updated-dependencies:
- dependency-name: pillow
  dependency-version: 12.2.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

demo/requirements.txt

@@ -7,7 +7,7 @@ gradio
 gradio_client
 spaces
 
-Pillow==11.1.0
+Pillow==12.2.0
 opencv-python-headless==4.11.0.86
 datasets==3.6.0