GH Actions: work around intermittent apt-get errors#44

jrfnl merged 1 commit intomainPHPCSStandards/PHPCSDevCS:mainfrom

feature/ghactions-xmllint-bypass-apt-get-updatePHPCSStandards/PHPCSDevCS:feature/ghactions-xmllint-bypass-apt-get-updateCopy head branch name to clipboard