build(deps-dev): bump mypy-boto3 from 1.18.26 to 1.18.29

Bumps [mypy-boto3](https://github.com/vemel/mypy_boto3_builder) from 1.18.26 to 1.18.29.
- [Release notes](https://github.com/vemel/mypy_boto3_builder/releases)
- [Commits](https://github.com/vemel/mypy_boto3_builder/commits)

---
updated-dependencies:
- dependency-name: mypy-boto3
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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