Update mkdocs-material to 9.5.20#479

pyup-bot wants to merge 1 commit intomastermgurdal/aegis:masterfrom

pyup-update-mkdocs-material-5.3.0-to-9.5.20mgurdal/aegis:pyup-update-mkdocs-material-5.3.0-to-9.5.20Copy head branch name to clipboard