DOC: fix model registry code examples (#3504)
DOC: fix model registry code examples (#3504)

Signed-off-by: sbrugman <445b0af15fdd9ee5cd6888dc1fcf9bf0ef179004@gmail.com>
mlflow/mlflow,mlflow/mlflow,mlflow/mlflow,mlflow/mlflow,mlflow/mlflow,mlflow/mlflow,mlflow/mlflow