NG: Update Furo styles and scripts to version 2024.05.06

[amotl]

About

@msbt updated to Furo 2024.5.6. Thanks! This patch updates corresponding vendorized styles.

Preview

https://crate-docs-theme--508.org.readthedocs.build/en/508/

Howto

In order to update to the most recent sources of Furo, best matching the relevant version in setup.py, run this procedure:

git clone https://github.com/pradyunsg/furo
cd furo
git checkout 2024.05.06
cd src/furo/assets
cp -r * /path/to/crate-docs-theme/src/crate/theme/rtd/crate/static/vendor/furo/

Then, commit the changed files selectively.