fix: set manifest.dev for bare bento upload

[frostming]

Signed-off-by: Frost Ming me@frostming.com

What does this PR address?

Fixes #(issue)

Before submitting:

• [ ] Does the Pull Request follow Conventional Commits specification naming? Here are GitHub's guide on how to create a pull request.
• [ ] Does the code follow BentoML's code style, pre-commit run -a script has passed (instructions)?
• [ ] Did you read through contribution guidelines and follow development guidelines?
• [ ] Did your changes require updates to the documentation? Have you updated those accordingly? Here are documentation guidelines and tips on writting docs.
• [ ] Did you write tests to cover your changes?