Add retries if resource doesn't exist

scripts/mdx-scripts/talk-conversion.js

@@ -125,14 +125,16 @@ ${converter.makeMarkdown(abstract ?? "")}
  * @param {string} url
  */
 async function resourceExists(url) {
-
   const time = Math.trunc(Math.random() * 10000);
   await sleep(time);
 
-  const timer = setTimeout(() => console.log("not done", time, url), time + 3000);
+  const timer = setTimeout(() => {
+    console.log("retrying", time, url);
+    resourceExists(url);
+  }, time + 3000);
   const response = await fetch(url);
 
-  clearTimeout(timer)
+  clearTimeout(timer);
 
   return (
     response.status.toString().startsWith("2") ||