install-python-tensorflow-gym

TensorFlow in Linux is now on the most current version, too, which
depends on Keras3. Keras3 also requires a new test script due to the
changed imports. This is changed in the windows and linux instructions.

In the linux instructions some packages for the data science lecture
have been added:

- pyogrio is now restricted to <0.8.0 until a new release is made,
because of https://github.com/geopandas/pyogrio/pull/443
- lxml is added for simple web scraping with pandas.
- fastparquet and zstandard for zstd support of pandas and geopandas.
- contextily for map backgrounds in geopandas non-interactive plots.
- networkx, pyvis and netgraph for graph based data handling.
- ipywidgets for GUI elements in Jupyter Notebooks.