Fix SAM example in documentation (#22887)

fix sam example

docs/source/en/model_doc/sam.mdx

@@ -39,12 +39,14 @@ The original code can be found [here](https://github.com/facebookresearch/segmen
 Below is an example on how to run mask generation given an image and a 2D point:
 
 ```python
+import torch
 from PIL import Image
 import requests
-from transformers import SamModelForMaskedGeneration, SamProcessor
+from transformers import SamModel, SamProcessor
 
-model = SamModelForMaskedGeneration.from_pretrained("facebook/sam-vit-huge")
-processsor = SamProcessor.from_pretrained("facebook/sam-vit-huge")
+device = "cuda" if torch.cuda.is_available() else "cpu"
+model = SamModel.from_pretrained("facebook/sam-vit-huge").to(device)
+processor = SamProcessor.from_pretrained("facebook/sam-vit-huge")
 
 img_url = "https://huggingface.co/ybelkada/segment-anything/resolve/main/assets/car.png"
 raw_image = Image.open(requests.get(img_url, stream=True).raw).convert("RGB")
@@ -93,4 +95,4 @@ Resources:
 ## SamModel
 
 [[autodoc]] SamModel
-    - forward
\ No newline at end of file
+    - forward