Made changes to readme and pinning to llamastack v0.0.61

[heyjustinai]

What does this PR do?

Pinning zero2hero to 0.0.61 and updated readme

Test Plan

Please describe:

• Did a end to end test on the server and inference for 0.0.61

Server output:

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Ran pre-commit to handle lint / formatting issues.
• Read the contributor guideline,
  Pull Request section?
• Updated relevant documentation.
• Wrote necessary unit or integration tests.