Update to Gradle 8.5

Author: PhilWakelin

.github/workflows/java.yaml

@@ -51,6 +51,6 @@ jobs:
         distribution: 'semeru'
     - uses: gradle/actions/setup-gradle@v3
       with: 
-        gradle-version: 7.6
+        gradle-version: 8.5
     - name: Build with Gradle
       run: gradle build -Pjava_version=${{ matrix.jdk }}