docs: update readme about huggingface gradio demo (#27)

LGTM

Author: Benjamin-eecs

README.md

@@ -11,8 +11,8 @@
   <a href="https://www.deepseek.com/" target="_blank">
     <img alt="Homepage" src="images/badge.svg" />
   </a>
-  <a href="https://chat.deepseek.com/" target="_blank">
-    <img alt="Chat" src="https://img.shields.io/badge/🤖%20Chat-DeepSeek%20LLM-536af5?color=536af5&logoColor=white" />
+  <a href="https://huggingface.co/spaces/deepseek-ai/DeepSeek-VL-7B" target="_blank">
+    <img alt="Chat" src="https://img.shields.io/badge/🤖%20Chat-DeepSeek%20VL-536af5?color=536af5&logoColor=white" />
   </a>
   <a href="https://huggingface.co/deepseek-ai" target="_blank">
     <img alt="Hugging Face" src="https://img.shields.io/badge/%F0%9F%A4%97%20Hugging%20Face-DeepSeek%20AI-ffc107?color=ffc107&logoColor=white" />