train: train_ounce100m -- download_checkpoint prefix/landing-dir fix (found by P1 v2)

train/train_ounce100m.py

@@ -204,7 +204,8 @@ def main():
             say(f"downloaded {got['files']} files, {got['bytes']/1e6:.0f} MB in {got['seconds']}s")
             if got["bytes"] < 1_000_000:
                 raise SystemExit("auto-resume downloaded a checkpoint that is not real weights")
-            args.resume = dest
+            args.resume = got["dir"]
+            say(f"resuming from {args.resume}")
     cur = SD.load_cursor(args.resume) if args.resume else None
     if args.resume:
         say(f"resume from {args.resume} cursor={cur}")