Though the seventh-generation iPod nano is only just beginning to appear in stores, there’s already a software update available for the new media player: Apple has just released software version 1.0.1. The software update simply lists, “Support for iPod nano (7th generation)” as the only feature; iPod nanos shipped with 1.0 installed, so it’s unclear as to what bugs were addressed. To update the new iPod nano, plug the device…