Warning with Scipy on python 3.9

[smarie]

https://python-qds.github.io/qdscreen/generated/gallery/1_remove_correlated_vars_demo/

we can see this:

/home/runner/work/qdscreen/qdscreen/.nox/publish-3-9/lib/python3.9/site-packages/pkg_resources/__init__.py:2804: DeprecationWarning: Deprecated call to `pkg_resources.declare_namespace('mpl_toolkits')`.
Implementing implicit namespace packages (as specified in PEP 420) is preferred to `pkg_resources.declare_namespace`. See https://setuptools.pypa.io/en/latest/references/keywords.html#keyword-namespace-packages
  declare_namespace(pkg)
/home/runner/work/qdscreen/qdscreen/.nox/publish-3-9/lib/python3.9/site-packages/sklearn/utils/multiclass.py:14: DeprecationWarning: Please use `spmatrix` from the `scipy.sparse` namespace, the `scipy.sparse.base` namespace is deprecated.
  from scipy.sparse.base import spmatrix
/home/runner/work/qdscreen/qdscreen/.nox/publish-3-9/lib/python3.9/site-packages/sklearn/utils/optimize.py:18: DeprecationWarning: Please use `line_search_wolfe2` from the `scipy.optimize` namespace, the `scipy.optimize.linesearch` namespace is deprecated.
  from scipy.optimize.linesearch import line_search_wolfe2, line_search_wolfe1
/home/runner/work/qdscreen/qdscreen/.nox/publish-3-9/lib/python3.9/site-packages/sklearn/utils/optimize.py:18: DeprecationWarning: Please use `line_search_wolfe1` from the `scipy.optimize` namespace, the `scipy.optimize.linesearch` namespace is deprecated.
  from scipy.optimize.linesearch import line_search_wolfe2, line_search_wolfe1