website: fixed ca provider references (#5185)
website: fixed ca provider references (#5185)

Fixes https://github.com/hashicorp/consul/issues/5182.
youhong316/consul,kingland/consul,42wim/consul,kingland/consul,kingland/consul,hashicorp/consul,42wim/consul,kingland/consul,youhong316/consul,youhong316/consul,youhong316/consul,vamage/consul,hashicorp/consul,scalp42/consul,scalp42/consul,42wim/consul,vamage/consul,vamage/consul,42wim/consul,42wim/consul,scalp42/consul,kingland/consul,hashicorp/consul,vamage/consul,vamage/consul,youhong316/consul,scalp42/consul,scalp42/consul,hashicorp/consul