Fix up projection bias calculation (#1059)

### Description

This PR fixes which attribute the tensor containing the bias for the up
projection is assigned to.

### Motivation and Context

Previously, the calculated bias was incorrectly being assigned to the
down projection's bias instead of the up projection's bias.

src/python/py/models/quantized_model.py

@@ -333,7 +333,7 @@ def __init__(self, quant_type, input_path, bits, group_size, q_size, kv_size, in
                             # model.layers.layer_id.mlp.gate_up_proj.bias
                             # model.layers.layer_id.mlp.dense_h_to_4h.bias
                             module.mlp.gate_proj.bias = tensor[: intermediate_size]
-                            module.mlp.down_proj.bias = tensor[intermediate_size: ]
+                            module.mlp.up_proj.bias = tensor[intermediate_size: ]
                         else:
                             raise NotImplementedError(f"{name} in your quantized model is not recognized.")