Bump boto3 from 1.34.99 to 1.35.0 in /src/py3.8

Bumps [boto3](https://github.com/boto/boto3) from 1.34.99 to 1.35.0.
- [Release notes](https://github.com/boto/boto3/releases)
- [Commits](boto/boto3@1.34.99...1.35.0)

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

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