Doc: use "unnumbered" footnotes (GH-98954)

Use unnumbered footnote in this file to avoid reseting the footnotes numbering.

Example: when building the tutorial into a PDF and using `latex_show_urls = "footnotes"`; this footnote become the number 8. However, without this change, the footnote shows the number 1.
(cherry picked from commit f042646595)

Co-authored-by: Manuel Kaufmann <humitos@gmail.com>
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Miss Islington (bot) 2022-11-01 06:35:34 -07:00 committed by GitHub
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@ -122,7 +122,7 @@ An example that uses most of the list methods::
You might have noticed that methods like ``insert``, ``remove`` or ``sort`` that You might have noticed that methods like ``insert``, ``remove`` or ``sort`` that
only modify the list have no return value printed -- they return the default only modify the list have no return value printed -- they return the default
``None``. [1]_ This is a design principle for all mutable data structures in ``None``. [#]_ This is a design principle for all mutable data structures in
Python. Python.
Another thing you might notice is that not all data can be sorted or Another thing you might notice is that not all data can be sorted or
@ -731,5 +731,5 @@ interpreter will raise a :exc:`TypeError` exception.
.. rubric:: Footnotes .. rubric:: Footnotes
.. [1] Other languages may return the mutated object, which allows method .. [#] Other languages may return the mutated object, which allows method
chaining, such as ``d->insert("a")->remove("b")->sort();``. chaining, such as ``d->insert("a")->remove("b")->sort();``.