Add acknowledgement section to README.md

README.md

@@ -13,4 +13,6 @@
   * It comes with a **reasonable level of user and developer documentation**.
 * It is named `AddressBook Level 3` (`AB3` for short) because it was initially created as a part of a series of `AddressBook` projects (`Level 1`, `Level 2`, `Level 3` ...).
 * For the detailed documentation of this project, see the **[Address Book Product Website](https://se-education.org/addressbook-level3)**.
-* This project is a **part of the se-education.org** initiative. If you would like to contribute code to this project, see [se-education.org](https://se-education.org/#contributing-to-se-edu) for more info.
+
+### Acknowledgement
+This project is based on the AddressBook-Level3 project created by the [SE-EDU initiative](https://se-education.org).