Update cfg.md cfg.machine.param.name when defining setting of PCA-CCA

[enicolaisen]

Hello!

I would like to report an error in the documentation. In the subsection cfg.machine.name it says:

"PCA-CCA analysis is defined by cfg.machine.name = cca and cfg.machine.param = {'PCAx' 'PCAy'}",

but I think it should say:

cfg.machine.param.name

Thanks!

Best,

Eli

@kaurao