FLUT-948126-[others]: Updated the read me file

Author: ManiKesavaraj

README.md

@@ -1,11 +1,11 @@
 # How to draw custom thumb in Flutter Range Slider?
-This repository contains a sample to Create a customized thumb on a [Syncfusion® Range Slider](https://help.syncfusion.com/flutter/range-slider/getting-started) widget.
+This repository contains a sample to Create a customized thumb on a [Syncfusion® Range Slider](https://help.syncfusion.com/flutter/range-slider/getting-started) widget.
 
 Please refer the KB through this link.
 
-## Syncfusion® controls:
+## Syncfusion® controls:
 
-This project used the following Syncfusion® widget(s):
+This project used the following Syncfusion® widget(s):
 * [SfRangeSlider](https://help.syncfusion.com/flutter/range-slider/getting-started)
 
 ## Supported platforms
@@ -26,4 +26,4 @@ Refer to the following link to know about system requirements - [System Requirem
 
 ## License
 
-Syncfusion® has no liability for any damage or consequence that may arise by using or viewing the samples. The samples are for demonstrative purposes, and if you choose to use or access the samples, you agree to not hold Syncfusion® liable, in any form, for any damage that is related to use, for accessing, or viewing the samples. By accessing, viewing, or seeing the samples, you acknowledge and agree Syncfusion’s® samples will not allow you seek injunctive relief in any form for any claim related to the sample. If you do not agree to this, do not view, access, utilize, or otherwise do anything with Syncfusion’s® samples.
+Syncfusion® has no liability for any damage or consequence that may arise by using or viewing the samples. The samples are for demonstrative purposes, and if you choose to use or access the samples, you agree to not hold Syncfusion® liable, in any form, for any damage that is related to use, for accessing, or viewing the samples. By accessing, viewing, or seeing the samples, you acknowledge and agree Syncfusion’s® samples will not allow you seek injunctive relief in any form for any claim related to the sample. If you do not agree to this, do not view, access, utilize, or otherwise do anything with Syncfusion’s® samples.

test/widget_test.dart

@@ -7,8 +7,7 @@
 
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
-
-import 'package:datagrid_simple_sample/main.dart';
+import 'package:how_to_draw_custom_thumb_in_range_slider/main.dart';
 
 void main() {
  testWidgets('Counter increments smoke test', (WidgetTester tester) async {