add name of timestamper on timestamp upload file comment.
add name of timestamper on timestamp upload file comment.

see
https://github.com/elabftw/elabftw/issues/1667#issuecomment-1192694980

elabftw/elabftw,elabftw/elabftw,elabftw/elabftw,elabftw/elabftw,elabftw/elabftw