Resolve "Add new sklearn feature to classification chapter"

Closes #69

See merge request sis/courses/machinelearning-introduction-workshop!51

# Conflicts:
#   02_classification.ipynb

- fails otherwise (tested on Windows 11)
- clear all outputs

- based on tests after clean install

Update environment to latest versions of Python, sklearn, jupyterlab and tensorflow and make minor changes to notebooks

Neural networks update

See merge request sis/courses/machinelearning-introduction-workshop!38

Merge branch '26-add-images-data-classification-w-svm-and-squeeze-out-a-lot-of-performance' into 'master'

Resolve "Add images data classification w/ SVM and squeeze out a lot of performance"

Closes #26

See merge request sis/courses/machinelearning-introduction-workshop!49