remove 'shortcut' from favicon meta tag
remove 'shortcut' from favicon meta tag

This isn't needed and was never part of the spec.
Great article here: https://evilmartians.com/chronicles/how-to-favicon-in-2021-six-files-that-fit-most-needs#did-we-forget-anyone

Also:
https://mathiasbynens.be/notes/rel-shortcut-icon
squidfunk/mkdocs-material,squidfunk/mkdocs-material,squidfunk/mkdocs-material,squidfunk/mkdocs-material