Update debian/ubuntu packages of ooniprobe to 1.6.1
ooniprobe 1.6.0 is now out. We should update the debian and ubuntu packages with this latest version.
An important thing to be included inside of this debian package is an update for the default configuration file that should adjust the measurement concurrency to some lower default values (https://github.com/TheTorProject/ooni-probe/commit/71e2b411377319f88b5c19f25e0339158dfcc677#diff-b88627b099cf32e47e846bd60fc63891L40).