Bump aiohttp from 3.8.6 to 3.9.1

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>

requirements.txt

@@ -1,4 +1,4 @@
-aiohttp==3.8.6
+aiohttp==3.9.1
 dateparser==1.1.8
 dblpy==0.4.0
 discord.py==2.3.2