Update index.json

Author: railslectures

index.json

@@ -1399,6 +1399,11 @@
       "file": "use-lightcells-to-iterate-rows-and-write-each-rows-data-to-a-csv-file-for-external-processing.cs",
       "title": "Use LightCells to iterate rows and write each row's data to a CSV file for external processing."
     },
+    {
+      "category": "open-workbook",
+      "file": "write-pivot-table-definitions-while-saving-with-lightcellsdataprovider-to-recreate-analytical-views-in-the-output-workbook.cs",
+      "title": "Write pivot table definitions while saving with LightCellsDataProvider to recreate analytical views in the output workbook."
+    },
     {
       "category": "queries-and-connections",
       "file": "add-a-custom-http-header-to-a-webquery-connection-for-required-authentication-token.cs",