add java 16 notice

Author: lucasstarsz

README.md

@@ -1,10 +1,11 @@
 # FastJ Java Template Program
 
-## How to Access
+## How to Use
 
 - Clone the repository `git clone https://github.com/lucasstarsz/fastj-java-template`
 - Or download from https://github.com/lucasstarsz/fastj-java-template/releases/latest
 
+_Note: this project uses Java 16 and Gradle 7._
 
 ## Running the Program