Bug 1812639 - Update libvpx updatebot contact r=webrtc-reviewers,mjf

Differential Revision: https://phabricator.services.mozilla.com/D168122

media/libvpx/moz.yaml

@@ -35,8 +35,8 @@ origin:
   license-file: LICENSE
 
 updatebot:
-    maintainer-phab: bryce
+    maintainer-phab: chunmin
-    maintainer-bz: bvandyk@mozilla.com
+    maintainer-bz: cchang@mozilla.com
     tasks:
       - type: vendoring
         enabled: true