Bump aiobotocore from 2.7.0 to 2.8.0

Bumps [aiobotocore](https://github.com/aio-libs/aiobotocore) from 2.7.0 to 2.8.0.
- [Release notes](https://github.com/aio-libs/aiobotocore/releases)
- [Changelog](https://github.com/aio-libs/aiobotocore/blob/master/CHANGES.rst)
- [Commits](aio-libs/aiobotocore@2.7.0...2.8.0)

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

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