Update SightConfig.php

[vekien]

User agent must match the latest version, which can be found from the apple store page: https://apps.apple.com/gb/app/id1293662920

It's also on the google play store page: https://play.google.com/store/apps/details?id=com.square_enix.android_googleplay.ffxivcomapp_e

a bit easier than fishing it out of Fiddler