[docs] Audio task guides fixes (#23239)

trainer parameters fixed

docs/source/en/tasks/asr.mdx

@@ -282,7 +282,7 @@ At this point, only three steps remain:
 ...     args=training_args,
 ...     train_dataset=encoded_minds["train"],
 ...     eval_dataset=encoded_minds["test"],
-...     tokenizer=processor.feature_extractor,
+...     tokenizer=processor,
 ...     data_collator=data_collator,
 ...     compute_metrics=compute_metrics,
 ... )

docs/source/en/tasks/text-to-speech.mdx

@@ -469,7 +469,7 @@ Instantiate the `Trainer` object  and pass the model, dataset, and data collator
 ...     train_dataset=dataset["train"],
 ...     eval_dataset=dataset["test"],
 ...     data_collator=data_collator,
-...     tokenizer=processor.tokenizer,
+...     tokenizer=processor,
 ... )
 ```