Add link to User Agent

getusermedia.html

@@ -1809,7 +1809,7 @@ <h2>Constrainable Properties</h2>
                 <p class="fingerprint">The UA MAY disguise concurrent use of
                 the camera, by downscaling, upscaling, and/or cropping to mimic native
                 resolutions when "none" is used, but only when the camera is in
-                use in another application outside the User Agent.</p>Note that
+                use in another application outside the [=User Agent=].</p>Note that
                 <code><a data-link-for=
                 "ConstrainablePattern">getConstraints</a></code> may not return
                 exactly the same string for strings not in this enum. This
@@ -1928,7 +1928,7 @@ <h2>Constrainable Properties</h2>
                   occur in the input source, except as noted below.</p>
                   <p class="fingerprint">Note: The UA MAY upscale to
                   disguise concurrent use, but only when the camera is in use
-                  in another application outside the User Agent.</p>
+                  in another application outside the [=User Agent=].</p>
                 </td>
               </tr>
             </tbody>