Merge pull request #13 from xdev-software/update-from-template

Update from template

Author: AB-xdev

.github/workflows/checkBuild.yml

@@ -21,7 +21,7 @@ jobs:
 
     strategy:
       matrix:
-        java: [17]
+        java: [17, 21]
         distribution: [temurin]
 
     steps:

CONTRIBUTING.md

@@ -19,7 +19,7 @@ We also encourage you to read the [contribution instructions by GitHub](https://
 ### Software Requirements
 You should have the following things installed:
 * Git
-* Java 17 - should be as unmodified as possible (Recommended: [Eclipse Adoptium](https://adoptium.net/temurin/releases/))
+* Java 21 - should be as unmodified as possible (Recommended: [Eclipse Adoptium](https://adoptium.net/temurin/releases/))
 * Maven
 
 ### Recommended setup