Bump code of conduct file content

Author: petk

CODE_OF_CONDUCT.md

@@ -1,11 +1,5 @@
 # Code of conduct
 
-This repository is part of the [PHP.earth](https://github.com/phpearth) organization.
-
-We make our best efforts to guarantee a safe, inclusive and harassment-free
-environment for everyone, regardless of age, body size, disability, ethnicity,
-gender identity and expression, level of experience, nationality, personal
-appearance, race, religion, or sexual identity and orientation.
-
-The latest and full version of the code of conduct is available on the
-[PHP.earth website](https://php.earth/conduct).
+This project is part of the [PHP.earth](https://php.earth) group which follows a
+[code of conduct](https://conduct.php.earth) to guarantee a welcoming, safe,
+inclusive, and harassment-free environment for anyone.