Update pip install

notebooks/unit2/unit2.ipynb

@@ -1,5 +1,15 @@
 {
   "cells": [
+    {
+      "cell_type": "markdown",
+      "metadata": {
+        "id": "view-in-github",
+        "colab_type": "text"
+      },
+      "source": [
+        "<a href=\"https://colab.research.google.com/github/huggingface/deep-rl-class/blob/main/notebooks/unit2/unit2.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
+      ]
+    },
     {
       "cell_type": "markdown",
       "metadata": {
@@ -190,7 +200,7 @@
       },
       "outputs": [],
       "source": [
-        "!pip install -r pip install -r https://raw.githubusercontent.com/huggingface/deep-rl-class/main/notebooks/unit2/requirements-unit2.txt"
+        "!pip install -r https://raw.githubusercontent.com/huggingface/deep-rl-class/main/notebooks/unit2/requirements-unit2.txt"
       ]
     },
     {
@@ -1724,7 +1734,8 @@
         "Ji_UrI5l2zzn",
         "67OdoKL63eDD",
         "B2_-8b8z5k54"
-      ]
+      ],
+      "include_colab_link": true
     },
     "gpuClass": "standard",
     "kernelspec": {