Fix typo

src/transformers/tokenization_utils_base.py

@@ -3276,7 +3276,7 @@ class PreTrainedTokenizerBase(SpecialTokensMixin, PushToHubMixin):
         """
         warnings.warn(
             "`prepare_seq2seq_batch` is deprecated and will be removed in version 5 of 🤗 Transformers. Use the "
-            "regular `__call__` method to prepare your inputs and the tokenizer under the `with_target_tokenizer` "
+            "regular `__call__` method to prepare your inputs and the tokenizer under the `as_target_tokenizer` "
             "context manager to prepare your targets. See the documentation of your specific tokenizer for more "
             "details",
             FutureWarning,