Bump starlette in /end-to-end-use-cases/whatsapp_llama_4_bot

Bumps [starlette](https://github.com/encode/starlette) from 0.46.2 to 0.47.2.
- [Release notes](https://github.com/encode/starlette/releases)
- [Changelog](https://github.com/Kludex/starlette/blob/main/docs/release-notes.md)
- [Commits](https://github.com/encode/starlette/compare/0.46.2...0.47.2)

---
updated-dependencies:
- dependency-name: starlette
  dependency-version: 0.47.2
  dependency-type: direct:production
...

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

end-to-end-use-cases/whatsapp_llama_4_bot/requirements.txt

@@ -36,7 +36,7 @@ requests==2.32.3
 rich==13.9.4
 shellingham==1.5.4
 sniffio==1.3.1
-starlette==0.46.2
+starlette==0.47.2
 tabulate==0.9.0
 together==1.5.5
 tqdm==4.67.1