website: Clarification to learning_gem5 part 1 simple config

Indicated on part 1 "Creating a simple configuration script"
that MinorCPU does not work with X86 as of gem5 version 22.0.0.

Change-Id: I8b64e53de5718db14f167acf72488418f04f7171
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5-website/+/61029
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
Tested-by: Bobby Bruce <bbruce@ucdavis.edu>
1 file changed