Bump aiohttp from 3.9.0 to 3.9.4 in /webinars/genai-chatbot

Bumps [aiohttp](https://github.com/aio-libs/aiohttp) from 3.9.0 to 3.9.4.
- [Release notes](https://github.com/aio-libs/aiohttp/releases)
- [Changelog](https://github.com/aio-libs/aiohttp/blob/master/CHANGES.rst)
- [Commits](aio-libs/aiohttp@v3.9.0...v3.9.4)

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

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

Author: dependabot[bot]

webinars/genai-chatbot/requirements.txt

@@ -1,4 +1,4 @@
-aiohttp==3.9.0
+aiohttp==3.9.4
 aiosignal==1.3.1
 altair==5.1.2
 annotated-types==0.6.0