[BEiT] Fix test (#27934)

Fix test

Author: NielsRogge

src/transformers/models/beit/modeling_beit.py

@@ -1349,8 +1349,8 @@ def get_input_embeddings(self):
     def forward(
         self,
         pixel_values: Tensor,
-        output_attentions: Optional[bool] = None,
         output_hidden_states: Optional[bool] = None,
+        output_attentions: Optional[bool] = None,
         return_dict: Optional[bool] = None,
     ) -> BackboneOutput:
         """