Bump html-proofer from 5.0.10 to 5.1.0#400

SethTisue merged 2 commits intomainscala/scala.epfl.ch:mainfrom

dependabot/bundler/html-proofer-5.1.0scala/scala.epfl.ch:dependabot/bundler/html-proofer-5.1.0Copy head branch name to clipboard