update readme

Author: pxpm

README.md

@@ -80,7 +80,7 @@ Start with the ["Introduction" page in our docs](https://backpackforlaravel.com/
 ## Install
 
 For the current version (recommended):
-- [Install Backpack v5 on Laravel 9 or 8](https://backpackforlaravel.com/docs/5.x/installation);
+- [Install Backpack v5 on Laravel 10, 9 or 8](https://backpackforlaravel.com/docs/5.x/installation);
 
 For the previous versions (not recommended):
 - [Install Backpack 4.1 on Laravel 6, 7 or 8](https://backpackforlaravel.com/docs/4.1/installation) - last feature update was 1st Jan 2021;