Update mci.py

Add _initialize_weights = _init_weights alias for backward compatibility with transformers <4.5

mci.py

@@ -917,6 +917,8 @@ class ConvFFN(nn.Module):
             if m.bias is not None:
                 nn.init.constant_(m.bias, 0)
 
+    _initialize_weights = _init_weights
+
     def forward(self, x: torch.Tensor) -> torch.Tensor:
         x = self.conv(x)
         x = self.fc1(x)