Update unit1.ipynb

notebooks/unit1/unit1.ipynb

@@ -694,7 +694,7 @@
         "# TODO: Train it for 1,000,000 timesteps\n",
         "\n",
         "# TODO: Specify file name for model and save the model to file\n",
-        "model_name = \"\"\n"
+        "model_name = \"ppo-LunarLander-v2\"\n",
       ]
     },
     {
@@ -1179,4 +1179,4 @@
   },
   "nbformat": 4,
   "nbformat_minor": 0
-}
+}