change hyperlink to match updated geoMAD product

How_to_guides/Machine_learning_with_ODC.ipynb

@@ -9,7 +9,7 @@
     "* **[Sign up to the DEA Sandbox](https://app.sandbox.dea.ga.gov.au/)** to run this notebook interactively from a browser\n",
     "* **Compatibility:** Notebook currently compatible with both the `NCI` and `DEA Sandbox` environments\n",
     "* **Products used:** \n",
-    "[ga_ls8c_nbart_gm_cyear_3](https://explorer.dea.ga.gov.au/ga_ls8c_nbart_gm_cyear_3)\n",
+    "[ga_ls8cls9c_gm_cyear_3](https://explorer.dea.ga.gov.au/products/ga_ls8cls9c_gm_cyear_3)\n",
     "* **Special requirements:** A shapefile of labelled data in shapefile format is required to use this notebook.\n",
     "An example dataset is provided.\n",
     "* **Prerequisites:** A basic understanding of supervised learning techniques is required. \n",