Fix `from yolov5 import utils` statement (#7578)

tutorial.ipynb

@@ -410,7 +410,7 @@
         "%pip install -qr requirements.txt  # install\n",
         "\n",
         "import torch\n",
-        "from yolov5 import utils\n",
+        "import utils\n",
         "display = utils.notebook_init()  # checks"
       ],
       "execution_count": null,