Added instructions to download the sample image

Author: fercer

notebooks/Zarr_and_Dask_for_large-scale_image_analysis-Lesson-2.ipynb

@@ -62,12 +62,20 @@
     "import tifffile"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Download the *CMU-1.svs* image from the [test data repository of OpenSlide](https://openslide.cs.cmu.edu/download/openslide-testdata/Aperio/). This is a brightfield image of around 169.33 MB in the SVS format."
+   ]
+  },
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": null,
    "metadata": {},
    "outputs": [],
    "source": [
+    "# Change this path to the location of the \"CMU-1.svs\" image that was downloaded.\n",
     "input_path = \"CMU-1.svs\""
    ]
   },