Update contribution guidelines to use Pint for code style management

Author: mr-chetan

CONTRIBUTING.md

@@ -4,11 +4,11 @@ This page contains guidelines for contributing to the StringEncode package. Plea
 
 ## Coding Guidelines
 
-We follow the [PSR-4](https://www.php-fig.org/psr/psr-4/) autoloading standard and follow the [PSR-12](https://www.php-fig.org/psr/psr-12/) coding style guide. To make it easy to comply with the coding standard we use php-cs-fixer to manage the style of the code base. Before pushing your code please ensure you run the following on your changes.
+We follow the [PSR-4](https://www.php-fig.org/psr/psr-4/) autoloading standard and follow the [PSR-12](https://www.php-fig.org/psr/psr-12/) coding style guide. To make it easy to comply with the coding standard we use pint to manage the style of the code base. Before pushing your code please ensure you run the following on your changes.
 
 ```bash
-./vendor/bin/php-cs-fixer fix
+./vendor/bin/pint
 ```
 
-Please ensure you comply to these standards when creating a PR to make it easy to review and merge. 
+Please ensure you comply to these standards when creating a PR to make it easy to review and merge.
 Thank you.