Fix colab install (#132)

Author: alan-cooney

docs/content/demo.ipynb

@@ -69,7 +69,7 @@
     "\n",
     "#  Install if in Colab\n",
     "if in_colab:\n",
-    "    %pip install sparse_autoencoder, transformer_lens, transformers, wandb\n",
+    "    %pip install sparse_autoencoder transformer_lens transformers wandb\n",
     "\n",
     "# Otherwise enable hot reloading in dev mode\n",
     "if not in_colab:\n",