fix: add sampling rate to config

configuration_hifigan.py

@@ -12,6 +12,7 @@ class HiFiGANConfig(PretrainedConfig):
         upsample_initial_channel=512,
         upsample_kernel_sizes=[16, 16, 4, 4],
         model_in_dim=80,
+        sampling_rate=22050,
         **kwargs,
     ):
         self.resblock_kernel_sizes = resblock_kernel_sizes
@@ -20,4 +21,5 @@ class HiFiGANConfig(PretrainedConfig):
         self.model_in_dim = model_in_dim
         self.upsample_initial_channel = upsample_initial_channel
         self.upsample_kernel_sizes = upsample_kernel_sizes
+        self.sampling_rate = sampling_rate
         super().__init__(**kwargs)