Update demo/MMSegmentation_Tutorial.ipynb

Author: MeowZheng

demo/MMSegmentation_Tutorial.ipynb

@@ -67,7 +67,7 @@
    "outputs": [],
    "source": [
     "# Install PyTorch\n",
-    "conda install pytorch==1.12.0 torchvision==0.13.0 torchaudio==0.12.0 cudatoolkit=11.3 - c pytorch\n",
+    "!conda install pytorch==1.12.0 torchvision==0.13.0 torchaudio==0.12.0 cudatoolkit=11.3 - c pytorch\n",
     "# Install mim\n",
     "!pip install -U openmim\n",
     "# Install mmengine\n",