ReadMe updated with KB link

jayaleshwari · web-flow · commit 70a0c69adf0e · 2021-06-18T09:58:45.000+05:30
diff --git a/README.md b/README.md
@@ -1,2 +1 @@
-# leading-and-trailing-dates-using-cell-builder-flutter-date-range-picker
-How to customize leading and trailing dates using cell builder in the Flutter Date Range Picker (SfDateRangePicker)
+**[View document in Syncfusion Flutter Knowledge base](https://www.syncfusion.com/kb/12674/how-to-customize-leading-and-trailing-dates-using-cell-builder-in-the-flutter-date-range)**

Original file line number	Diff line number	Diff line change
`@@ -1,2 +1 @@`
`1`		`-# leading-and-trailing-dates-using-cell-builder-flutter-date-range-picker`
`2`		`-How to customize leading and trailing dates using cell builder in the Flutter Date Range Picker (SfDateRangePicker)`
	`1`	`+[View document in Syncfusion Flutter Knowledge base](https://www.syncfusion.com/kb/12674/how-to-customize-leading-and-trailing-dates-using-cell-builder-in-the-flutter-date-range)`