Update of ED report from new reffy run

Using reffy commit 18.4.7.

Author: reffy-bot

ed/index.json

@@ -1,7 +1,7 @@
 {
   "type": "crawl",
   "title": "Reffy crawl",
-  "date": "2025-04-26T06:42:41.265Z",
+  "date": "2025-04-26T12:48:42.149Z",
   "options": {
     "fallback": "ed/index.json",
     "output": "report",
@@ -953,7 +953,7 @@
       "headings": "headings/av1-mpeg2-ts.json",
       "ids": "ids/av1-mpeg2-ts.json",
       "cddl": [],
-      "error": "Error: Loading https://aomediacodec.github.io/av1-mpeg2-ts/ triggered HTTP status 404\n    at processSpecification (file:///home/runner/work/webref/webref/node_modules/reffy/src/lib/util.js:486:19)\n    at async crawlSpec (file:///home/runner/work/webref/webref/node_modules/reffy/src/lib/specs-crawler.js:107:22)\n    at async processSpec (file:///home/runner/work/webref/webref/node_modules/reffy/src/lib/specs-crawler.js:388:22)\n    at async ThrottledQueue.runThrottled (file:///home/runner/work/webref/webref/node_modules/reffy/src/lib/throttled-queue.js:78:22)\n    at async Promise.all (index 4)\n    at async crawlList (file:///home/runner/work/webref/webref/node_modules/reffy/src/lib/specs-crawler.js:409:21)"
+      "error": "Error: Loading https://aomediacodec.github.io/av1-mpeg2-ts/ triggered HTTP status 404\n    at processSpecification (file:///home/runner/work/webref/webref/node_modules/reffy/src/lib/util.js:486:19)\n    at async crawlSpec (file:///home/runner/work/webref/webref/node_modules/reffy/src/lib/specs-crawler.js:107:22)\n    at async processSpec (file:///home/runner/work/webref/webref/node_modules/reffy/src/lib/specs-crawler.js:388:22)\n    at async ThrottledQueue.runThrottled (file:///home/runner/work/webref/webref/node_modules/reffy/src/lib/throttled-queue.js:78:22)"
     },
     {
       "url": "https://aomediacodec.github.io/av1-rtp-spec/",