chore(deps): bump types-aiobotocore-s3 in /src/backend (#207)

Bumps [types-aiobotocore-s3](https://github.com/youtype/mypy_boto3_builder) from 3.1.1 to 3.1.2.
- [Release notes](https://github.com/youtype/mypy_boto3_builder/releases)
- [Commits](https://github.com/youtype/mypy_boto3_builder/commits)

---
updated-dependencies:
- dependency-name: types-aiobotocore-s3
  dependency-version: 3.1.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]