Fix typo in docstring for pipeline (#10591)

src/transformers/pipelines/__init__.py

@@ -271,7 +271,7 @@ def pipeline(
             - :obj:`"text2text-generation"`: will return a :class:`~transformers.Text2TextGenerationPipeline`.
             - :obj:`"text-generation"`: will return a :class:`~transformers.TextGenerationPipeline`.
             - :obj:`"zero-shot-classification:`: will return a :class:`~transformers.ZeroShotClassificationPipeline`.
-            - :obj:`"conversation"`: will return a :class:`~transformers.ConversationalPipeline`.
+            - :obj:`"conversational"`: will return a :class:`~transformers.ConversationalPipeline`.
         model (:obj:`str` or :obj:`~transformers.PreTrainedModel` or :obj:`~transformers.TFPreTrainedModel`, `optional`):
             The model that will be used by the pipeline to make predictions. This can be a model identifier or an
             actual instance of a pretrained model inheriting from :class:`~transformers.PreTrainedModel` (for PyTorch)