[css-2026] Noted that the updated Media Type registration obsoletes RFC 2318, w3c#5310

Author: svgeesus

css-2026/Overview.bs

@@ -978,6 +978,8 @@ Safe to Release pre-CR Exceptions</h2>
 
 <h2 id="media-type">The text/css media type</h2>
 
+This updated registration obsoletes <a href="https://datatracker.ietf.org/doc/html/rfc2318">RFC 2318</a>.
+
 <pre>
 Type name: text