[FIX] check_inputs function in lumina2 (#10784)

Author: SahilCarterr

src/diffusers/pipelines/lumina2/pipeline_lumina2.py

@@ -379,7 +379,9 @@ def check_inputs(
         max_sequence_length=None,
     ):
         if height % (self.vae_scale_factor * 2) != 0 or width % (self.vae_scale_factor * 2) != 0:
-            raise ValueError(f"`height` and `width` have to be divisible by 8 but are {height} and {width}.")
+            raise ValueError(
+                f"`height` and `width` have to be divisible by {self.vae_scale_factor * 2} but are {height} and {width}."
+            )
 
         if callback_on_step_end_tensor_inputs is not None and not all(
             k in self._callback_tensor_inputs for k in callback_on_step_end_tensor_inputs