Fix link to Editor's Draft

Author: tidoust

video_frame_metadata_registry.src.html

@@ -5,7 +5,7 @@
 Shortname: webcodecs-video-frame-metadata-registry
 Level: none
 Group: mediawg
-ED: https://w3c.github.io/webcodecs/video-frame-metadata-registry.html
+ED: https://w3c.github.io/webcodecs/video_frame_metadata_registry.html
 TR: https://www.w3.org/TR/webcodecs-video-frame-metadata-registry/
 Editor: Youenn Fablet, w3cid 96458, Apple Inc., youenn@apple.com