Test compile with Java 25 & Update docs

Author: AB-xdev

.github/workflows/check-build.yml

@@ -28,7 +28,7 @@ jobs:
     timeout-minutes: 30
     strategy:
       matrix:
-        java: [17, 21]
+        java: [17, 21, 25]
         distribution: [temurin]
     steps:
     - uses: actions/checkout@v5

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 21 - should be as unmodified as possible (Recommended: [Eclipse Adoptium](https://adoptium.net/temurin/releases/))
+* Java 25 - should be as unmodified as possible (Recommended: [Eclipse Adoptium](https://adoptium.net/temurin/releases/))
 * Maven (Note that the [Maven Wrapper](https://maven.apache.org/wrapper/) is shipped with the repo)
 
 ### Recommended setup