website: Add post for gem5 22.0 release

Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Change-Id: I91137ff49d8f33e8ac79e16d03cdafe08643d28f
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5-website/+/60609
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
Tested-by: Bobby Bruce <bbruce@ucdavis.edu>
1 file changed