Regenerate README file - 2024-05-02 (#242)

Co-authored-by: Alain Schlesser <alain.schlesser@gmail.com>

README.md

@@ -316,7 +316,7 @@ wp package install wp-cli/scaffold-package-command:@stable
 To install the latest development version of this package, use the following command instead:
 
 ```bash
-wp package install wp-cli/scaffold-package-command:dev-master
+wp package install wp-cli/scaffold-package-command:dev-main
 ```
 
 ## Contributing