Upload preprocessor_config.json

Update feature extractor preprocessor_config.json (rename UnivNetFeatureExtractor to UnivNetGanFeatureExtractor)

preprocessor_config.json

@@ -3,7 +3,7 @@
   "compression_clip_val": 1e-05,
   "compression_factor": 1.0,
   "do_normalize": false,
-  "feature_extractor_type": "UnivNetFeatureExtractor",
+  "feature_extractor_type": "UnivNetGanFeatureExtractor",
   "feature_size": 1,
   "filter_length": 1024,
   "fmax": 12000.0,