doc: Updated documentation of predictFromGps

lib/+artoa/+toa/predictFromGps.m

 function [gpsRafosDates, predictedToa, launchDateToa] = predictFromGps(pRfb, pSoundSource, pSoundspeed, pLeapsecondsMatrix)
-%ESTIMATETOAFROMGPS Summary of this function goes here
-%   Detailed explanation goes here
+%PREDICTFROMGPS Predicts TOA based on the given input parameter.
+%   This is also known as ETA.
 
 %% Collect Float data
 gpsData = pRfb.SAT_DATA;