move mimeType definitions after other members added in the meantime

Author: fippo

index.bs

@@ -382,7 +382,7 @@ dictionary RTCEncodedVideoFrameMetadata {
     <dd>
         <p>
             The media presentation timestamp (PTS) in microseconds of raw frame, matching the
-      {{VideoFrame/timestamp}} for raw frames which correspond to this frame.
+            {{VideoFrame/timestamp}} for raw frames which correspond to this frame.
         </p>
     </dd>
     <dt>
@@ -395,7 +395,7 @@ dictionary RTCEncodedVideoFrameMetadata {
             that reflects the sampling instant of the first octet in the RTP data packet.
         </p>
     </dd>
-    <dd>
+    <dt>
         <dfn dict-member>mimeType</dfn> of type <span class="idlMemberType">DOMString</span>
     </dt>
     <dd>
@@ -510,7 +510,6 @@ dictionary RTCEncodedAudioFrameMetadata {
     </dd>
     <dt>
         <dfn dict-member>contributingSources</dfn> <span class=
-        <dfn dict-member>contributingSources</dfn> of type <span class=
             "idlMemberType">sequence&lt;unsigned long&gt;</span>
     </dt>
     <dd>