Removes annoying warning: missing "sampling_rate" argument

An annoying warning about the missing sampling_rate argument in the processor call was printed at every call of the map_to_pred function.
"It is strongly recommended to pass the ``sampling_rate`` argument to this function. Failing to do so can result in silent errors that might be hard to debug."

README.md

@@ -102,7 +102,7 @@ model = Wav2Vec2ForCTC.from_pretrained("facebook/wav2vec2-large-960h-lv60-self")
 processor = Wav2Vec2Processor.from_pretrained("facebook/wav2vec2-large-960h-lv60-self")
 
 def map_to_pred(batch):
-    inputs = processor(batch["audio"]["array"], return_tensors="pt", padding="longest")
+    inputs = processor(batch["audio"]["array"], return_tensors="pt", padding="longest", sampling_rate=batch["audio"]["sampling_rate"])
     input_values = inputs.input_values.to("cuda")
     attention_mask = inputs.attention_mask.to("cuda")