[Snyk] Upgrade mini-css-extract-plugin from 0.5.0 to 0.8.0#19

snyk-bot wants to merge 1 commit intomasteradamlaska/github.com-aspnet-AspNetCore.Docs:masterfrom

snyk-upgrade-651f45bd9e63251309817660533c6e4aadamlaska/github.com-aspnet-AspNetCore.Docs:snyk-upgrade-651f45bd9e63251309817660533c6e4aCopy head branch name to clipboard