Fix broken image because center tags
Fix broken image because center tags

I removed the center tags to show the validation flow correctly.

Signed-off-by: Juan David Gomez <5eda632e258b27c7a123083bdb5cfe57d9995c94@gmail.com>

johnsandiford/notary,vdemeester/notary,johnsandiford/notary,HuKeping/notary,jfrazelle/notary,umayr/notary,endophage/notary,docker/notary,docker/notary,HuKeping/notary,vdemeester/notary,vdemeester/notary,umayr/notary,johnsandiford/notary,endophage/notary,HuKeping/notary,docker/notary,endophage/notary,umayr/notary,jfrazelle/notary,jfrazelle/notary