Add note in polygons-lines tuto to refer to the osm tuto

doc/tutorial/climada_entity_Exposures_polygons_lines.ipynb

@@ -24,7 +24,13 @@
     "    * Interpolate geometries to points to fit in an `Exposure` instance; \n",
     "    * Disaggregate the respective geometry values to the point values\n",
     "2. Perform the impact calculation in CLIMADA with the point exposure\n",
-    "3. Aggregate the calculated point `Impact` back to an impact instance for the initial polygons or lines  "
+    "3. Aggregate the calculated point `Impact` back to an impact instance for the initial polygons or lines  \n",
+    "\n",
+    "Note:\n",
+    "Polygons or lines can be useful to represent specific types of exposures such as infrastructures (e.g. roads)\n",
+    "or landuse types (e.g. crops, forests). In CLIMADA, it is possible to retrieve such specific exposure types using \n",
+    "[OpenStreetMap data](https://www.openstreetmap.org/). Please refer to the associated [tutorial](https://climada-python.readthedocs.io/en/latest/tutorial/climada_entity_Exposures_osm.html) to learn \n",
+    "how to do so."
    ]
   },
   {
@@ -2692,7 +2698,7 @@
  "metadata": {
   "hide_input": false,
   "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
+   "display_name": "climada_osm",
    "language": "python",
    "name": "python3"
   },
@@ -2706,7 +2712,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.8.12"
+   "version": "3.9.18"
   },
   "latex_envs": {
    "LaTeX_envs_menu_present": true,