poetry: bump boto3 from 1.34.67 to 1.38.8

Bumps [boto3](https://github.com/boto/boto3) from 1.34.67 to 1.38.8.
- [Release notes](https://github.com/boto/boto3/releases)
- [Commits](boto/boto3@1.34.67...1.38.8)

---
updated-dependencies:
- dependency-name: boto3
  dependency-version: 1.38.8
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]