docs(oci): name Node.js 24 as the oracle's runtime in domainToASCII

The ts-oracle runs in the node:24 image versions.yaml pins; the comment
still named Node.js 26 from before that pin was settled.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: aledbf

internal/oci/whatwghost.go

@@ -138,7 +138,7 @@ var whatwgIDNA = idna.New(
 	idna.VerifyDNSLength(false),
 )
 
-// domainToASCII is WHATWG domain to ASCII (beStrict false) as Node.js 26 (the
+// domainToASCII is WHATWG domain to ASCII (beStrict false) as Node.js 24 (the
 // version versions.yaml pins for the oracle) runs it: a pure-ASCII domain is
 // only lower-cased, its "xn--" labels not checked as Punycode.
 func domainToASCII(domain string) (string, error) {