Update of TR report from new reffy run

Using reffy commit 18.8.1.

Author: reffy-bot

tr/index.json

@@ -1,7 +1,7 @@
 {
   "type": "crawl",
   "title": "Reffy crawl",
-  "date": "2025-06-07T01:53:09.470Z",
+  "date": "2025-06-08T01:36:41.116Z",
   "options": {
     "fallback": "tr/index.json",
     "output": "report",
@@ -756,7 +756,7 @@
         "https://aomediacodec.github.io/av1-spec/"
       ],
       "crawled": "https://aomediacodec.github.io/av1-spec/av1-spec.pdf",
-      "date": "7 June 2025",
+      "date": "8 June 2025",
       "links": "links/av1-spec.json",
       "cddl": []
     },