Update README.md

Author: lizhuoyuan

README.md

@@ -42,7 +42,7 @@ import 'package:flutter_screenutil/flutter_screenutil.dart';
 
 ### Initialize and set the fit size and font size to scale according to the system's "font size" accessibility option
 Please set the width and height of the design draft before use, the width and height of the design draft (unit px).
-Be sure to set the page in the MaterialApp's home(ie the entry file, just set it once) to ensure that the fit size is set before each use:
+Be sure to set the page in the MaterialApp's home/initialRoute(ie the entry file, just set it once) to ensure that the fit size is set before each use:
 
 ```dart