fix KIC 8435766 desc typo

I attempted repeated to use Exoplanet's built-in editing function using iOS 6.1.3 10B329, but it crashes with 'NSInvalidArgumentException', reason: 'Application tried to presetn a nil modal view controller on target <RawDataController: 0x1e96ef90>.'
Corrected spelling
Corrected spelling
Merge pull request #20 from al-x/master

fix desc typo in KIC 8435766 b