minor fix

llama-rs/src/loader2.rs

@@ -128,7 +128,7 @@ impl<F: FnMut(LoadProgress)> ggml_loader::LoadHandler<LoadError, BufReader<&File
  Some(model) => model,
  None => {
  let model = brkchk(self.create_model(self.vocab.clone()))?;
- self.model.get_or_insert(model)
+ self.model.insert(model)
  }
  };