docs: add credits

Author: adhocore

README.md

@@ -114,3 +114,8 @@ if (!getenv('<LAST_ENV_APP_SHOULD_BE_AWARE_OF>')) {
 
 For example if your app last introduced `FB_APP_ID` env, but this value is not already hard set in the machine,
 it would be loaded via `.env` file else you are already covered.
+
+### Credits
+
+This project is [release](https://github.com/adhocore/php-env/releases)
+managed by [please](https://github.com/adhocore/please).