Readme update (#44)

OskarStark · Oct 27, 2021 · 008741b · 008741b
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 # GithubAction for PHP-CS-Fixer
 
+> NOTE: If you didn't create a .php-cs-fixer.php file, do that first before adding this workflow. An example of this file created by the creators of php-cs-fixer can be found [here.](https://github.com/FriendsOfPHP/PHP-CS-Fixer/blob/master/.php-cs-fixer.dist.php)
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 ## Usage
 
 You can use it as a Github Action like this: