fix "piano" typo (#31027)

src/transformers/models/pop2piano/modeling_pop2piano.py

@@ -71,7 +71,7 @@ POP2PIANO_INPUTS_DOCSTRING = r"""
             so you should be able to pad the inputs on both the right and the left. Indices can be obtained using
             [`AutoTokenizer`]. See [`PreTrainedTokenizer.encode`] and [`PreTrainedTokenizer.__call__`] for detail.
             [What are input IDs?](../glossary#input-ids) To know more on how to prepare `input_ids` for pretraining
-            take a look a [Pop2Pianp Training](./Pop2Piano#training).
+            take a look a [Pop2Piano Training](./Pop2Piano#training).
         attention_mask (`torch.FloatTensor` of shape `(batch_size, sequence_length)`, *optional*):
             Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:
             - 1 for tokens that are **not masked**,