update with cover for unstable versions

Author: tranthienbinh1989

Diff for: README.md

@@ -3,7 +3,9 @@
 This composer plugin is used to protect Adobe Commerce merchants from Dependency confusion attacks. It will detect when a public version of a package 
 at packagist.org has a higher version than the one available from a private like repo.magento.com. When you try to install/update packages with composer,
 if it detects a potential issue, the plugin will give you a recommendation message and stop the process.
-
+<br />
+<br />
+By default the plugin will obey the stability configuration in the composer.json config file which is `stable` by default. If you would like to be covered for unstable versions of a package (dev, alpha, beta, RC), you can either change the `minimum-stability` level or explicit require a dev version or only betas with the version constraint for ex: ‘^1.0.2-beta1’
 ## Installation
 
 ```shell