Bump pillow from 11.3.0 to 12.0.0 in /demos (#1649)

Bumps [pillow](https://github.com/python-pillow/Pillow) from 11.3.0 to 12.0.0.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](python-pillow/Pillow@11.3.0...12.0.0)

---
updated-dependencies:
- dependency-name: pillow
  dependency-version: 12.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

demos/imagetagger/requirements.txt

@@ -1,6 +1,6 @@
 aiohttp==3.13.0
 aiohttp-jinja2==1.6
 keras==3.11.3
-Pillow==11.3.0
+Pillow==12.0.0
 tensorflow==2.20.0
 trafaret_config==2.0.2