Fix the issue of P-tuning official sample error (#8884)

* Fix the issue of P-tuning official sample error

* Create codecov workflow.yml

* Delete .github/workflows/workflow.yml

Author: guangyunms

legacy/examples/few_shot/p-tuning/data.py

@@ -139,7 +139,8 @@ def convert_ids_to_words(example, token_ids):
     the length of which should coincide with that of `mask` in prompt.
     """
     if "label_ids" in example:
-        labels = paddle.index_select(token_ids, paddle.to_tensor(example.pop("label_ids")), axis=0).squeeze(0)
+        label_ids_tensor = paddle.to_tensor([example.pop("label_ids")], dtype='int64')
+        labels = paddle.index_select(token_ids, label_ids_tensor, axis=0).squeeze(0)
         example["labels"] = labels
     return example