website: Fixed gem5art blog link

Change-Id: Ifeaa8f3b368dee8993da4fe563a932882bf55473
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5-website/+/29824
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>
Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu>
Tested-by: Bobby R. Bruce <bbruce@ucdavis.edu>
1 file changed