README: update info about PHAR

As the Phar is now published with each release (and on each action run), there is no need to include build instruction in the README anymore.

Also, the instructions as they were, were outdated after 70

Author: jrfnl

README.md

@@ -19,8 +19,7 @@ The application is officially supported for use with PHP 5.3 to 8.1.
 3. [History](#history)
 4. [Command line options](#command-line-options)
 5. [Recommended excludes for Symfony framework](#recommended-excludes-for-symfony-framework)
-6. [Create Phar package](#create-phar-package)
-7. [How to upgrade](#how-to-upgrade)
+6. [How to upgrade](#how-to-upgrade)
 
 ## Installation
 
@@ -36,6 +35,9 @@ Alternatively you can install as a standalone `composer` project:
 For colored output, install the suggested package `php-parallel-lint/php-console-highlighter`:
 
     composer require --dev php-parallel-lint/php-console-highlighter
+    
+Since v1.3.0, a PHAR file is also made available for each release.
+This PHAR file is published as an asset for each release and can be found on the [Releases](https://github.com/php-parallel-lint/PHP-Parallel-Lint/releases) page.
 
 ## Example output
 
@@ -91,18 +93,6 @@ To run from the command line:
 
     vendor/bin/parallel-lint --exclude app --exclude vendor .
 
-## Create Phar package
-
-PHP Parallel Lint supports [Box app](https://box-project.github.io/box2/) for creating Phar package. First, install box app:
-
-
-    curl -LSs https://box-project.github.io/box2/installer.php | php
-
-
-then run the build command in parallel lint folder, which creates `parallel-lint.phar` file.
-
-
-    box build
 
 ## How to upgrade