Fix two more broken links.

mixer/v1/attributes.proto

@@ -51,7 +51,7 @@ option cc_enable_arenas = true;
 // specialized Mixer adapters and services can also generate attributes.
 //
 // The common baseline set of attributes available in most Istio deployments is defined
-// [here](https://istio.io/docs/reference/config/mixer/attribute-vocabulary.html).
+// [here](https://istio.io/docs/reference/config/policy-and-telemetry/attribute-vocabulary/).
 //
 // Attributes are strongly typed. The supported attribute types are defined by
 // [ValueType](https://github.com/istio/api/blob/master/policy/v1beta1/value_type.proto).

policy/v1beta1/cfg.proto

@@ -91,7 +91,7 @@ message AttributeManifest {
   // match the regular expression `[\.-]`.
   //
   // Attribute names must be unique within a single Istio deployment. The set of canonical
-  // attributes are described at [here](https://istio.io/docs/reference/attribute-vocabulary.html).
+  // attributes are described at [here](https://istio.io/docs/reference/config/policy-and-telemetry/attribute-vocabulary/).
   // Attributes not in that list should be named with a component-specific suffix such as
   // `request.count-my.component`.
   map<string, AttributeInfo> attributes = 3;