fix parameters name

Author: azraelkuan

examples/fastspeech2/conf/fastspeech2.v2.baker.yaml

@@ -16,7 +16,7 @@ format: "npy"
 ###########################################################
 model_type: "fastspeech2"
 
-fastspeech_params:
+fastspeech2_params:
     dataset: baker
     n_speakers: 1
     encoder_hidden_size: 256

examples/multiband_melgan/conf/multiband_melgan.v1.baker.yaml

@@ -17,7 +17,7 @@ format: "npy"
 ###########################################################
 model_type: "multiband_melgan_generator"
 
-generator_params:
+multiband_melgan_generator_params:
     out_channels: 4               # Number of output channels (number of subbands).
     kernel_size: 7                # Kernel size of initial and final conv layers.
     filters: 384                  # Initial number of channels for conv layers.