fixing typo d instead of b

model.py

@@ -77,7 +77,7 @@ class BidirectionalLSTM(nn.Module):
         self.hidden_size = cfg["BidirectionalLSTM"]["HiddenSize"]
         self.num_layers =  cfg["BidirectionalLSTM"]["NumLayers"]
         self.LSTM_dropout    =  cfg["BidirectionalLSTM"]["LSTMDropout"]
-        self.FFN_dropout    = cfg["DidirectionalLSTM"]["FFNDropout"]
+        self.FFN_dropout    = cfg["BidirectionalLSTM"]["FFNDropout"]
         self.num_ffn    = cfg["BidirectionalLSTM"]["NumFFN"]
 
         self.lstm = nn.LSTM(input_size, self.hidden_size, self.num_layers, batch_first = True, bidirectional =True, dropout = self.LSTM_dropout)