configs: Fix terminology to 'ticks' in NPB configs

Instructions was not the correct terminolgy here. It should be ticks.

Change-Id: I08c125049e8dc2cc8c488a820530c6c6a45d7367
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/53847
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
1 file changed