external ref fixes

Author: hoch

index.bs

@@ -43,6 +43,8 @@ Abstract: This specification describes a high-level Web <abbr title="Application
     it is anticipated to be used with the <code>canvas</code> 2D [[2dcontext]]
     and WebGL [[WEBGL]] 3D graphics APIs.
 Markup Shorthands: markdown on, dfn on, css off
+Anchors:
+    url: https://www.w3.org/TR/mediacapture-streams/#dfn-microphone; type: enum-value; text: "microphone"; for: PermissionName; spec: mediacapture-streams
 </pre>
 
 <pre class=anchors>
@@ -11743,7 +11745,7 @@ Once per second, execute the update audio stats algorithm:
         [=Document/visibility state=] is `"visible"`, set <var>canUpdate</var> to
         true.
     1. Let <var>permission</var> be the [=permission state=] for the permission
-        associated with [=PermissionName/microphone | "microphone"=] access.
+        associated with [="microphone"=] access.
         If <var>permission</var> is "granted", set <var>canUpdate</var> to true.
     1. If <var>canUpdate</var> is false, abort these steps.
     1. Set {{[[underrun duration]]}} to the total duration of all [=underrun events=]