Bump requests from 2.32.3 to 2.33.0 in /demos/a2a_llama_stack

Bumps [requests](https://github.com/psf/requests) from 2.32.3 to 2.33.0.
- [Release notes](https://github.com/psf/requests/releases)
- [Changelog](https://github.com/psf/requests/blob/main/HISTORY.md)
- [Commits](psf/requests@v2.32.3...v2.33.0)

---
updated-dependencies:
- dependency-name: requests
  dependency-version: 2.33.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

demos/a2a_llama_stack/requirements.txt

@@ -53,7 +53,7 @@ python-dotenv==1.1.0
 pytz==2025.2
 PyYAML==6.0.2
 pyzmq==26.4.0
-requests==2.32.3
+requests==2.33.0
 rich==14.0.0
 six==1.17.0
 sniffio==1.3.1