Update colab link

app.py

@@ -187,7 +187,7 @@ button.svelte-1lcyrx4[aria-label="user's message: a file of type image/jpeg, "]
 
 demo = gr.ChatInterface(
     fn=chat,
-    description="""Try [Vintern-1B-v2-ViTable-docvqa](https://huggingface.co/YuukiAsuna/Vintern-1B-v2-ViTable-docvqa) in this demo. Vintern-1B-v2-ViTable-docvqa is a finetuned version of [Vintern-1B-v2](https://huggingface.co/5CD-AI/Vintern-1B-v2)""",
+    description="""Try [Vintern-1B-v2-ViTable-docvqa](https://huggingface.co/YuukiAsuna/Vintern-1B-v2-ViTable-docvqa) in this demo. Vintern-1B-v2-ViTable-docvqa is a finetuned version of [Vintern-1B-v2](https://huggingface.co/5CD-AI/Vintern-1B-v2). This space is running on a CPU, which makes the response time slow. You can use [this Colab](https://colab.research.google.com/drive/1ricMh4BxntoiXIT2CnQvAZjrGZTtx4gj?usp=sharing) with a free T4 GPU for faster responses.""",
     title="Vintern-1B-v2-ViTable-docvqa",
     multimodal=True,
     css=CSS