Consider a scenario where you need to update the Python libraries on a Databricks cluster that is currently running a production machine learning model. The cluster uses the Databricks Runtime for Machine Learning and currently has TensorFlow 1.15 installed. A new version of TensorFlow, version 2.4, has been released and is required for a new project. Describe the steps you would take to update the TensorFlow library on this cluster while minimizing downtime and ensuring that the production model continues to run without interruption.