add optmiziation to TOC

Author: nilsnolde

examples/basic_example.ipynb

@@ -38,7 +38,8 @@
     "- **[Matrix](#Matrix)**\n",
     "- **[POIs](#POIs)**\n",
     "- **[Geocoding](#Geocoding)**\n",
-    "- **[Elevation](#Elevation)**"
+    "- **[Elevation](#Elevation)**\n",
+    "- **[Optimization](#Optimization)**"
    ]
   },
   {