#180 Use local copy of stylesheets in embed_images_html5.py

[Dmitry Shachnev]

This is what all other tests are doing, and it allows to run the tests against installed package.

See how adding this patch fixed Debian's CI: https://salsa.debian.org/python-team/packages/python-docutils/-/commits/debian/master.

[engelbert gruber]

thanks a lot