dashboard: extend aix-ppc64 skip to the website repo
dashboard: extend aix-ppc64 skip to the website repo

Updates golang/go#31567

Change-Id: Ia8d996a70166c4395393f4674af87ad755104fe1
Reviewed-on: https://go-review.googlesource.com/c/build/+/192335
Run-TryBot: Bryan C. Mills <1c8aad60184261ccede67f5c63a0d2a3bf3c9ff4@google.com>
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

golang/build,golang/build,golang/build,golang/build