Fix issue tracker link in gem5-19 blog post

Change-Id: I949bd14b005109e270cacba037000e722f345ecd
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5-website/+/25883
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>
Tested-by: Jason Lowe-Power <jason@lowepower.com>
1 file changed