Update app.py

Update space for ZeroGPU as per [0dac0d94a8898ca9c104274ea91258fc534dc362](https://huggingface.co/spaces/victor/Granite-Vision-3.1-2B/commit/0dac0d94a8898ca9c104274ea91258fc534dc362)

app.py

@@ -1,3 +1,4 @@
+import spaces
 import random
 import torch
 import gradio as gr
@@ -16,6 +17,7 @@ def get_text_from_content(content):
             texts.append("[Image]")
     return " ".join(texts)
 
+@spaces.GPU
 def chat_inference(image, text, temperature, top_p, top_k, max_tokens, conversation):
     if conversation is None:
         conversation = []
@@ -39,7 +41,7 @@ def chat_inference(image, text, temperature, top_p, top_k, max_tokens, conversat
         tokenize=True,
         return_dict=True,
         return_tensors="pt"
-    ).to("cpu")
+    ).to("cuda")
 
     torch.manual_seed(random.randint(0, 10000))