news: update treasure hunt link

Author: gerryd

content/news/2025-02-01-update-treasure-hunt.html

@@ -15,7 +15,7 @@
 </p>
 
 <p>
-Update 2025-02-02 15:30: the soundbite is available <a href="https://ftp.fau.de/fosdem/2025/treasurehunt/four.ogg">here</a>.
+Update 2025-02-02 15:30: the soundbite is available <a href="https://video.fosdem.org/2025/treasurehunt/four.ogg">here</a>.
 </p>
 
 <img src="asset:a1-1" style="float:left;width:30%;margin:10px;"/>