fix env bug

demo/vibevoice_realtime_colab.ipynb

@@ -66,7 +66,7 @@
         "print(\"✅ Cloned VibeVoice repository\")\n",
         "\n",
         "# Install project dependencies\n",
-        "!uv pip --quiet install --system -e /content/VibeVoice\n",
+        "!uv pip --quiet install --system -e /content/VibeVoice[tts]\n",
         "!wget -q https://github.com/cloudflare/cloudflared/releases/latest/download/cloudflared-linux-amd64 -O cloudflared && chmod +x cloudflared\n",
         "print(\"✅ Installed dependencies\")\n",
         "\n",
@@ -91,7 +91,7 @@
       "metadata": {},
       "outputs": [],
       "source": [
-        "from huggingface_hub import login\n",
+        "from huggingface_hub import login, snapshot_download\n",
         "login()"
       ]
     },