Add line about using vagrant-hostsupdater in the Vagrant short guide (#17243)
Add line about using vagrant-hostsupdater in the Vagrant short guide (#17243)

This is documented in the Vagrantfile, but not in the README. As far as I know,
following the short guide without installing this plugin will not make the
container accessible at mastodon.local, thus breaking the last step of the
guide.
Ryanaka/mastodon,abcang/mastodon,cobodo/mastodon,imas/mastodon,im-in-space/mastodon,MitarashiDango/mastodon,ykzts/mastodon,glitch-soc/mastodon,glitch-soc/mastodon,yi0713/mastodon,cobodo/mastodon,pinfort/mastodon,yukimochi/mastodon,koba-lab/mastodon,musashino205/mastodon,gol-cha/mastodon,h3zjp/mastodon,h3zjp/mastodon,theoria24/mastodon,pinfort/mastodon,masto-donte-com-br/mastodon,maa123/mastodon,Ryanaka/mastodon,ykzts/mastodon,im-in-space/mastodon,yukimochi/mastodon,yi0713/mastodon,musashino205/mastodon,glitch-soc/mastodon,imas/mastodon,pinfort/mastodon,imas/mastodon,Kirishima21/mastodon,im-in-space/mastodon,yi0713/mastodon,h3zjp/mastodon,maa123/mastodon,tootcafe/mastodon,glitch-soc/mastodon,lindwurm/mastodon,Kirishima21/mastodon,maa123/mastodon,masto-donte-com-br/mastodon,masto-donte-com-br/mastodon,MitarashiDango/mastodon,gol-cha/mastodon,tootcafe/mastodon,h3zjp/mastodon,musashino205/mastodon,tootcafe/mastodon,pinfort/mastodon,yi0713/mastodon,gol-cha/mastodon,koba-lab/mastodon,Kirishima21/mastodon,musashino205/mastodon,yukimochi/mastodon,gol-cha/mastodon,abcang/mastodon,maa123/mastodon,theoria24/mastodon,cobodo/mastodon,Ryanaka/mastodon,abcang/mastodon,masto-donte-com-br/mastodon,koba-lab/mastodon,theoria24/mastodon,ykzts/mastodon,imas/mastodon,lindwurm/mastodon,Ryanaka/mastodon,im-in-space/mastodon,lindwurm/mastodon,lindwurm/mastodon,cobodo/mastodon,abcang/mastodon,koba-lab/mastodon,tootcafe/mastodon,MitarashiDango/mastodon,MitarashiDango/mastodon,Kirishima21/mastodon,ykzts/mastodon,yukimochi/mastodon,theoria24/mastodon