update heading for new guide

Author: jyaistMap

guide/02-api-overview/release_notes_210.ipynb

@@ -22,7 +22,8 @@
     "  * Adds [`Install in Google Collab`](../guide/install-and-set-up/#install-in-google-colaboratory) section\n",
     "* [Deep Learning with ArcGIS])(../guide/)\n",
     "  * [2d Computer Vision](../guide)\n",
-    "    * [How PSETAE works](../guide/how-PSETAE-works)\n",
+    "    * [Pixel Classification](../guide)\n",
+    "      * [How PSETAE works](../guide/how-PSETAE-works)\n",
     "  \n",
     "### [Samples](/python/samples/)\n",
     "* [GIS analysts and data sciencists](/python/samples)\n",