fix: image URL in notebook to use raw.githubusercontent.com (#20100)

docs/advanced_features/vlm_query.ipynb

@@ -65,7 +65,8 @@
     "nest_asyncio.apply()\n",
     "\n",
     "model_path = \"Qwen/Qwen2.5-VL-3B-Instruct\"\n",
-    "chat_template = \"qwen2-vl\""
+    "chat_template = \"qwen2-vl\"\n",
+    "example_image_url = \"https://raw.githubusercontent.com/sgl-project/sglang/main/examples/assets/example_image.png\""
    ]
   },
   {
@@ -81,13 +82,7 @@
     "\n",
     "from sglang.srt.parser.conversation import chat_templates\n",
     "\n",
-    "image = Image.open(\n",
-    "    BytesIO(\n",
-    "        requests.get(\n",
-    "            \"https://github.com/sgl-project/sglang/blob/main/examples/assets/example_image.png?raw=true\"\n",
-    "        ).content\n",
-    "    )\n",
-    ")\n",
+    "image = Image.open(BytesIO(requests.get(example_image_url).content))\n",
     "\n",
     "conv = chat_templates[chat_template].copy()\n",
     "conv.append_message(conv.roles[0], f\"What's shown here: {conv.image_token}?\")\n",
@@ -238,13 +233,7 @@
     "from sglang.srt.parser.conversation import chat_templates\n",
     "\n",
     "# Download the same example image\n",
-    "image = Image.open(\n",
-    "    BytesIO(\n",
-    "        requests.get(\n",
-    "            \"https://github.com/sgl-project/sglang/blob/main/examples/assets/example_image.png?raw=true\"\n",
-    "        ).content\n",
-    "    )\n",
-    ")\n",
+    "image = Image.open(BytesIO(requests.get(example_image_url).content))\n",
     "\n",
     "conv = chat_templates[chat_template].copy()\n",
     "conv.append_message(conv.roles[0], f\"What's shown here: {conv.image_token}?\")\n",