Updated "About DORIS/RINEX format":

-new version of the tar file "Routines to read DORIS/RINEX files": subroutines updated on 2024/05/16 in order to take into account the shift in frequency of some DORIS ground beacons

-new reference: Papanikolaou, X, 2023. Methodology for orbit determination using DORIS RINEX data, PhD dissertation, DOI: 10.12681/eadd/53868