Update default net to nn-97f742aaefcd.nnue

uploaded by Sergio Vieri

NNUE signature: 4254913
Bench: 4746616

src/ucioption.cpp

@@ -81,7 +81,7 @@ void init(OptionsMap& o) {
   o["Syzygy50MoveRule"]      << Option(true);
   o["SyzygyProbeLimit"]      << Option(7, 0, 7);
   o["Use NNUE"]              << Option(false, on_use_NNUE);
-  o["EvalFile"]              << Option("nn-c157e0a5755b.nnue", on_eval_file);
+  o["EvalFile"]              << Option("nn-97f742aaefcd.nnue", on_eval_file);
 }