The embeddable web player for Apple Music has been updated to provide an option for subscribers to sign in and listen to full songs across the web, according to a report by 9to5Mac. Discovered by a user on Reddit, the widget, which has long been available to allow for artists and music fans to promote and embed albums and playlists on web sites, now includes a “Sign in” button in the top right corner and at the bottom of the track listing.…