fix typo in overture example (#481)

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Author: kylebarron

examples/overture-maps.ipynb

@@ -15,11 +15,11 @@
     "\n",
     "This notebook will give a quick overview of using the new [Overture Maps Python library](https://github.com/OvertureMaps/overturemaps-py) with Lonboard.\n",
     "\n",
-    "We'll pass in a bounding box covering New York City and the Overture Python API will fetch only the data inside that bounding box. While Overture's buildings dataset contains 2.3 rows, by using a relatively small bounding box, we can download data for our query relatively quickly (around 30 seconds on my internet connection).\n",
+    "We'll pass in a bounding box covering New York City and the Overture Python API will fetch only the data inside that bounding box. While Overture's buildings dataset contains 2.3 **billion** rows, by using a relatively small bounding box, we can download data for our query relatively quickly (around 30 seconds on my internet connection).\n",
     "\n",
     "This uses the latest advancements of the [GeoParquet specification](https://geoparquet.org/). Data is fetched _directly from the cloud_ with no server in the middle!\n",
     "\n",
-    "You can view a [hosted version of this notebook on Notebook Sharing Space](https://notebooksharing.space/view/f16f8f4c7133c4576938b262f17ce617cf112106bc25a24a08b528f8f0d11828#displayOptions=) (26MB download)."
+    "You can view a [hosted version of this notebook on Notebook Sharing Space](https://notebooksharing.space/view/f16f8f4c7133c4576938b262f17ce617cf112106bc25a24a08b528f8f0d11828#displayOptions=) (26MB download).\n"
    ]
   },
   {