chore(deps-dev): bump boto3-stubs from 1.39.3 to 1.39.4 (#6966)

Bumps [boto3-stubs](https://github.com/youtype/mypy_boto3_builder) from 1.39.3 to 1.39.4.
- [Release notes](https://github.com/youtype/mypy_boto3_builder/releases)
- [Commits](https://github.com/youtype/mypy_boto3_builder/commits)

---
updated-dependencies:
- dependency-name: boto3-stubs
  dependency-version: 1.39.4
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]