Update .mailmap

Update .mailmap

Change-Id: I9962ced39ce3fd31cff446a99ba1c0b6ebfb1bbf
Reviewed-on: https://code.wireshark.org/review/18596
Reviewed-by: Erik de Jong <erikdejong@gmail.com>
Reviewed-by: Anish Bhatt <anish@gatech.edu>
Reviewed-by: Francisco Javier Sánchez-Roselly <franciscojavier.sanchezroselly@ujaen.es>
Reviewed-by: Mikael Kanstrup <mikael.kanstrup@gmail.com>
Reviewed-by: Franklin Mathieu <snaipe@diacritic.io>
Reviewed-by: Boris Bochkaryov <Boris-Bochkaryov@yandex.ru>
Reviewed-by: Alexis La Goutte <alexis.lagoutte@gmail.com>