iOS 26 and later support <link rel=dns-prefetch> (#7414)

Author: daytonlowell

features-json/link-rel-dns-prefetch.json

@@ -620,8 +620,8 @@
       "18.3":"u",
       "18.4":"u",
       "18.5-18.6":"u",
-      "26.0":"u",
-      "26.1":"u"
+      "26.0":"y",
+      "26.1":"y"
     },
     "op_mini":{
       "all":"n"