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

Bumps [idna](https://github.com/kjd/idna) from 3.10 to 3.15.
- [Release notes](https://github.com/kjd/idna/releases)
- [Changelog](https://github.com/kjd/idna/blob/master/HISTORY.md)
- [Commits](kjd/idna@v3.10...v3.15)

---
updated-dependencies:
- dependency-name: idna
  dependency-version: '3.15'
  dependency-type: direct:production
...

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

Author: dependabot[bot]

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

@@ -20,7 +20,7 @@ groq==0.22.0
 h11>=0.16.0
 httpcore==1.0.8
 httpx==0.28.1
-idna==3.10
+idna==3.15
 markdown-it-py==3.0.0
 mdurl==0.1.2
 multidict==6.4.3