Style: fix json file to match matplotlibrc

It looks like I used a style subtly different from yours.
I regenerated a file from your matplotlibrc, but that caused
matplotlib to stop inlining plots for an unknown reason.

Here's another blob, which only contains the difference between
the default scheme and your mplrc.
The ch1 graphs regenerate perfectly for me ( it might not for other people).

Also, there's a typo in the instructions on loading the json
style. it should be `rcParams` not `RcParams` - fix included.