Update gradio requirement from ==5.* to ==6.* in /framework/gradio

Updates the requirements on [gradio](https://github.com/gradio-app/gradio) to permit the latest version.
- [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/compare/gradio@5.0.0-beta.1...gradio@6.0.0)

---
updated-dependencies:
- dependency-name: gradio
  dependency-version: 6.0.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

framework/gradio/requirements.txt

@@ -1,2 +1,2 @@
-gradio==5.*
+gradio==6.*
 sqlalchemy-cratedb>=0.41.0.dev2