Bug#1064575: python-pyswarms-doc: please make the build reproducible.

[James Addison]

Followup-For: Bug #1064575
Control: forwarded -1 https://salsa.debian.org/science-team/pyswarms/-/merge_requests/2

Adding the suggested patch for this package (providing custom alt text for
the relevant animations) as a forwarded-link from this bugreport to Salsa.

On Mon, 26 Feb 2024 01:09:59 +0000, I wrote:
> However: I'm not yet sure about the implicit contracts/conventions are between
> these components (nbsphinx, docutils), so I may need to investigate/discuss
> further.

The mentioned additional investigation/discussion can be found at:

  * nbsphinx: https://github.com/spatialaudio/nbsphinx/pull/438
  * docutils: https://sourceforge.net/p/docutils/mailman/message/58746996/

(these are not directly related to the suggested localized fix for
python-pyswarms-doc, but are included for context about the root cause)