fix(app): import CogView4Transformer2DModel from the module that exports it

Author: psychedelicious

invokeai/app/invocations/cogview4_denoise.py

@@ -2,7 +2,7 @@
 
 import torch
 import torchvision.transforms as tv_transforms
-from diffusers import CogView4Transformer2DModel
+from diffusers.models.transformers.transformer_cogview4 import CogView4Transformer2DModel
 from torchvision.transforms.functional import resize as tv_resize
 from tqdm import tqdm