update readme

Author: vherus

README.md

@@ -1,6 +1,7 @@
 # Java Exercise Template
 
-This template contains a `Sample` class and a `SampleTest` class.
+This template contains a `Sample` class and a `SampleTest` class. When making changes, ensure you change the project
+name in the [settings.gradle](./settings.gradle) file.
 
 ## Learning Objectives
 - Sample learning objective