Editorial: Refer to RFC 9651, which obsoletes RFC 8941

prefetch.bs

@@ -109,7 +109,7 @@ spec: html; urlPrefix: https://html.spec.whatwg.org/multipage/
 spec: fetch; urlPrefix: https://fetch.spec.whatwg.org/
   type: dfn
     text: network partition key; url: network-partition-key
-spec: RFC8941; urlPrefix: https://www.rfc-editor.org/rfc/rfc8941.html
+spec: RFC9651; urlPrefix: https://www.rfc-editor.org/rfc/rfc9651.html
   type: dfn
     for: structured header
       text: Item; url: name-items
@@ -757,7 +757,7 @@ The <dfn>list of sufficiently strict speculative navigation referrer policies</d
 
 The <dfn http-header>`` `Sec-Purpose` ``</dfn> HTTP request header specifies that the request serves one or more purposes other than requesting the resource for immediate use by the user.
 
-The header field is an [[RFC8941]] Structured Header whose value must be a [=structured header/List=]. Its ABNF is:
+The header field is an [[RFC9651]] Structured Header whose value must be a [=structured header/List=]. Its ABNF is:
 
 ```
 Sec-Purpose = sf-list