examples/downloader: update suggested URL

The old one no longer worked. Using multiple URLs also helps better
showcase rich's progress bars.

Signed-off-by: Louis Sautier <sautier.louis@gmail.com>

examples/downloader.py

@@ -73,7 +73,8 @@ def download(urls: Iterable[str], dest_dir: str):
 
 
 if __name__ == "__main__":
-    # Try with https://releases.ubuntu.com/20.04/ubuntu-20.04.3-desktop-amd64.iso
+    # Try with https://releases.ubuntu.com/noble/ubuntu-24.04-desktop-amd64.iso
+    # and https://releases.ubuntu.com/noble/ubuntu-24.04-live-server-amd64.iso
     if sys.argv[1:]:
         download(sys.argv[1:], "./")
     else: