avoid conflict on cv2 import with apple silicon chips

Author: TillBeemelmanns

section_2_sensor_data_processing/6_grid_mapping.ipynb

@@ -99,6 +99,7 @@
    "outputs": [],
    "source": [
     "import os\n",
+    "import cv2\n",
     "\n",
     "os.environ['TF_CPP_MIN_LOG_LEVEL'] = '3'\n",
     "import tensorflow as tf\n",