Bump aiohttp from 3.8.6 to 3.9.1 in /llm-server

Bumps [aiohttp](https://github.com/aio-libs/aiohttp) from 3.8.6 to 3.9.1.
- [Release notes](https://github.com/aio-libs/aiohttp/releases)
- [Changelog](https://github.com/aio-libs/aiohttp/blob/master/CHANGES.rst)
- [Commits](aio-libs/aiohttp@v3.8.6...v3.9.1)

---
updated-dependencies:
- dependency-name: aiohttp
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

llm-server/requirements.txt

@@ -1,5 +1,5 @@
 aiofiles==23.2.1
-aiohttp==3.9.0
+aiohttp==3.9.1
 aiosignal==1.3.1
 alembic==1.12.1
 amqp==5.1.1