ReadMe updated with KB link

jayaleshwari · web-flow · commit c588d84b39d3 · 2020-12-28T10:50:34.000+05:30
diff --git a/README.md b/README.md
@@ -1,2 +1 @@
-# customize-date-range-picker-cells-using-builder-flutter
-How to customize the date range picker cells using builder in the Flutter (SfDateRangePicker)
+**[View document in Syncfusion Flutter Knowledge base](https://www.syncfusion.com/kb/12208/how-to-customize-the-date-range-picker-cells-using-builder-in-the-flutter-sfdaterangepicker)**

Original file line number	Diff line number	Diff line change
`@@ -1,2 +1 @@`
`1`		`-# customize-date-range-picker-cells-using-builder-flutter`
`2`		`-How to customize the date range picker cells using builder in the Flutter (SfDateRangePicker)`
	`1`	`+[View document in Syncfusion Flutter Knowledge base](https://www.syncfusion.com/kb/12208/how-to-customize-the-date-range-picker-cells-using-builder-in-the-flutter-sfdaterangepicker)`