[update] what's new and migration guide for v9.2

Author: mafanya23

docs/migration.md

@@ -6,6 +6,33 @@ description: You can explore how to migrate to newer versions in the documentati
 
 #  Migration to newer versions
 
+9.1 -> 9.2
+-----------
+
+### Grid
+
+Since v9.2 the Grid component uses the WebAssembly-based library [Json2Excel](https://github.com/dhtmlx/json2excel) for [exporting Grid data to an Excel file](grid/usage.md/#exporting-data-to-excel). By default, you don't need to specify the link to the export module. 
+
+However, if you use your own export server, you need to install the **Json2Excel** library and provide the local path to the export module on your computer by setting the path to the **worker.js** file as `"../libs/json2excel/1.3/worker.js?vx"`:
+
+~~~jsx title="Before v9.2"
+grid.export.xlsx({
+    url: "https://export.dhtmlx.com/excel", // optional, the link to the export module
+    // more export settings
+});
+~~~
+
+~~~jsx title="From v9.2"
+grid.export.xlsx({
+    url: "../libs/json2excel/1.3/worker.js?vx", // optional, a local path to the export module
+    // more export settings
+});
+~~~
+
+:::info
+The previously used export module server is still available for the Suite versions up to v9.1. 
+:::
+
 9.0 -> 9.1
 -----------
 

docs/whatsnew.md

@@ -39,7 +39,10 @@ Released on June X, 2025
 ### Updates
 
 - Grid. The logic and appearance of the [drag-n-drop functionality](grid/configuration.md/#drag-n-drop) is improved. Check the [related sample](https://snippet.dhtmlx.com/uevdwjuo) 
-- Grid. The [export to Excel](grid/usage.md/#exporting-data-to-excel) functionality is updated
+- Grid. The [export to Excel](grid/usage.md/#exporting-data-to-excel) functionality is updated. The [Json2Excel](https://github.com/dhtmlx/json2excel) module is now used for exporting Grid data to Excel. Check the [Migration guide](migration.md/#91---92) for details
+- Grid. The [`xlsx()`](grid/api/export/grid_xlsx_method.md) method of the Export module gets two new properties:
+    - `tableName`- to set the name of a sheet with grid data in the Excel file
+    - `dateFormatMask` - to set the date format mask for Excel
 - Grid. The possibility to use keyboard navigation for [selecting ranges of cells](grid/configuration.md/#shortcut-keys-for-selecting-ranges-of-cells). The following shortcut keys and their combinations are available: 
 
 <table>