docs: authors: move Tobias one position higher

Tobias Klauser, one of the two netsniff-ng maintainers, did a lot
of excellent work since he joined our team. He has now reached a
commit count that is currently equal to Markus' count, but since
Tobias is more active, move him one position higher. Thanks for the
good work Tobias!

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>