copyright info out of date

[umlaeute]

just because I noticed it...

the copyright section on the README says

ssr/README

Lines 14 to 20 in aa757c9

	Copyright (c) 2016-2018 Division of Applied Acoustics
	Chalmers University of Technology
	Copyright (c) 2012-2021 Institut für Nachrichtentechnik, Universität Rostock
	Copyright (c) 2006-2012 Quality & Usability Lab
	Deutsche Telekom Laboratories, TU Berlin

this seems to be slightly out of date (at least, the dates)

[mgeier]

I'm not employed by any of those institutions (anymore), so my changes don't warrant any updates.

But maybe @JensAhrens wants to update the Chalmers one?