resources: Updates dist.gem5.org/images URLs

http: //dist.gem5.org/images has been moved to
http: //dist.gem5.org/dist/v20/images. This patch updates the URLs.
Change-Id: I02ab4608a470f003284fb66f6f8185d9fc022548
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5-resources/+/35119
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: Jason Lowe-Power <power.jg@gmail.com>
4 files changed
tree: ddae7ab68e2f4fcdcbd630eafeb03dbd9b8c881d
  1. README.md
  2. src/