change 4-band in comment to 3-band

Author: mkshah605

jupyter-notebooks/coastal-erosion-example/5_plotting_a_histogram.ipynb

@@ -80,7 +80,7 @@
     "import numpy as np\n",
     "from matplotlib import pyplot as plt\n",
     "\n",
-    "# This notebook explores a single 4-band (blue, green, red, NIR) PlanetScope scene in a UTM projection.\n",
+    "# This notebook explores a single 3-band (blue, green, red) PlanetScope scene in a UTM projection.\n",
     "image_file = \"/content/20170831_172754_101c_3B_AnalyticMS.tif\"\n",
     "\n",
     "# Use Rasterio to open the image.\n",
@@ -144,7 +144,6 @@
    ]
   },
   {
-   "attachments": {},
    "cell_type": "markdown",
    "id": "b70c572d",
    "metadata": {},
@@ -169,7 +168,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.6"
+   "version": "3.8.13"
   }
  },
  "nbformat": 4,