Remove stable from codec registry requirements

Author: chrisn

codec_registry.src.html

@@ -1,7 +1,7 @@
 <pre class='metadata'>
 Title: WebCodecs Codec Registry
 Repository: w3c/webcodecs
-Status: NOTE-ED
+Status: DRY
 Shortname: webcodecs-codec-registry
 Level: none
 Group: mediawg
@@ -45,7 +45,7 @@
 ==================================================================
 
 1. Each entry must include a unique codec string, a common name string, and a
-    link to a stable public specification.
+    link to a public specification.
 2. The codec string must be crafted as follows:
     1. If the codec string contains a fixed prefix with variable suffix values,
         the suffix must be represented by an asterisk and the registration's