message: docs: fix filter type url
diff: @@ -75,7 +75,7 @@ host when forwarding. See the example below within the configured routes.
  http_filters:
  - name: envoy.filters.http.dynamic_forward_proxy
  typed_config:
  - "@type": type.googleapis.com/envoy.config.cluster.dynamic_forward_proxy.v2alpha.ClusterConfig
  + "@type": type.googleapis.com/envoy.config.filter.http.dynamic_forward_proxy.v2alpha.FilterConfig
  dns_cache_config:
  name: dynamic_forward_proxy_cache_config
  dns_lookup_family: V4_ONLY
  