Release v0.39.1-rc3

What's Changed

New Features 🎉

• feat: reuse the same bigquery table for multiple model versions for Arize BQ Sink by @khorshuheng in #531

Other Changes

• fix(api): Change default GPU Request value and prevent null values from being accepted by @deadlycoconuts in #533
• Add documentation for model observability and model schema by @tiopramayudi in #528
• bug: fix json field typo for ranking output by @khorshuheng in #536
• Add MLObs onboarding docs to gitbook by @eric-lidong in #538
• pin mlflow by @leonlnj in #540
• fix: Fix order of pyfunc env vars based on priority by @tiopramayudi in #542

Full Changelog: v0.39.0...v0.39.1-rc2