3.15 PDF build fails

[m-aciek]

https://github.com/m-aciek/python-docs-offline/actions/runs/22244614409/job/64355796459

[m-aciek]

python/cpython#142676 introduced GIFs that fail the build.

[m-aciek]

It doesn't now: https://github.com/m-aciek/python-docs-offline/actions/runs/22886729238. Fixed with python/cpython#145480