build(deps): bump boto3 from 1.17.78 to 1.17.84

Bumps [boto3](https://github.com/boto/boto3) from 1.17.78 to 1.17.84.
- [Release notes](https://github.com/boto/boto3/releases)
- [Changelog](https://github.com/boto/boto3/blob/develop/CHANGELOG.rst)
- [Commits](boto/boto3@1.17.78...1.17.84)

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