fix spike rate physical units

Co-authored-by: Hans Ekkehard Plesser <[email protected]>

pynest/examples/one_neuron_with_noise.py

@@ -56,7 +56,7 @@
 ###############################################################################
 # Third, the Poisson generator is configured using ``SetStatus``, which expects
 # a list of node handles and a list of parameter dictionaries. We set the
-# Poisson generators to 8,000 spks/s and 15,000 spks/s, respectively. Note that
+# Poisson generators to 80,000 spks/s and 15,000 spks/s, respectively. Note that
 # we do not need to set parameters for the neuron and the voltmeter, since they
 # have satisfactory defaults.