Guoguo

to solve https://github.com/ageron/handson-ml3/issues/157

Thanks for helping us improve this project! **Describe the bug** Please provide a clear and concise description of what the bug is, and specify the notebook name and the cell...

source: https://scikit-learn.org/stable/modules/generated/sklearn.metrics.mean_squared_error.html squared is deprecated in 1.4 and will be removed in 1.6. Use [root_mean_squared_error](https://scikit-learn.org/stable/modules/generated/sklearn.metrics.root_mean_squared_error.html#sklearn.metrics.root_mean_squared_error) instead to calculate the root mean squared error.