Bump gradio from 3.44.4 to 4.11.0 in /demo

Bumps [gradio](https://github.com/gradio-app/gradio) from 3.44.4 to 4.11.0.
- [Release notes](https://github.com/gradio-app/gradio/releases)
- [Changelog](https://github.com/gradio-app/gradio/blob/main/CHANGELOG.md)
- [Commits](https://github.com/gradio-app/gradio/commits)

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

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

demo/requirements.txt

@@ -1,2 +1,2 @@
 lungtumormask @ git+https://github.com/vemundfredriksen/LungTumorMask.git
-gradio==3.44.4
+gradio==4.11.0