If you’re interested in buying the most up-to-date MacBook Air, you should probably wait for a week. MacRumors points out that French website MacGeneration is citing “reliable sources” to claim that Apple is going to launch an update line of 11-inch and 13-inch MacBook Airs next week. As for what this update will mean, MacRumors says “it is likely that a new MacBook Air at this point in time would feature a small speed bump among few other changes.” The last time we saw new versions of the MacBook Air was back in June last year, when Apple added Intel’s power-efficient Haswell processors and 802.11ac “Gigabit Wi-Fi” connectivity. Reports from earlier this year indicated that Apple would finally be launching