publish-2026apr6

What's Changed

• ⬆️ Bump sphinxcontrib-youtube from 1.4.1 to 1.5.0 by @dependabot[bot] in #846
• ⬆️ Bump dawidd6/action-download-artifact from 18 to 20 by @dependabot[bot] in #845
• Reduce bold font overuse in svd_intro lecture by @jstac in #841
• ⬆️ Bump sphinx-togglebutton from 0.4.4 to 0.4.5 by @dependabot[bot] in #840
• update quantecon-book-theme to 0.20.2 by @mmcky in #848

Full Changelog: publish-2026apr04...publish-2026apr6