fixed typos and changed phrasing

Author: jyaistMap

guide/02-api-overview/release-notes.ipynb

@@ -50,7 +50,7 @@
     "  * Fixed bug where custom symbology was not properly displaying\n",
     "  * Fixed issue when `map.layers` returned incorrect data type for layers\n",
     "  * Fixed issue for an exported map widget not honoring the extent\n",
-    "  * Added ability to use portalbasemaps with map widget\n",
+    "  * Fixed ability to use portal basemaps with map widget\n",
     "* Improved warning messages when required modules are not present\n",
     "* Improved messaging on [`Datastore Manager.add_cloudstore()`](* Improved warning messages when required modules are not present) method\n",
     "* Improved documentation for [`edit_control_points`](https://esri.github.io/arcgis-python-api/apidoc/html/arcgis.raster.orthomapping.html#edit-control-points) and [`match_control_points`](https://esri.github.io/arcgis-python-api/apidoc/html/arcgis.raster.orthomapping.html#match-control-points)\n",