Adding Java 23 to CI

.github/workflows/gradle.yml

@@ -15,6 +15,9 @@ on:
 
 jobs:
   build:
+    strategy:
+      matrix:
+        java-version: ['17', '23']
 
     runs-on: ubuntu-latest
     permissions:
@@ -22,10 +25,10 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
-    - name: Set up JDK 17
+    - name: Set up JDK ${{ matrix.java-version }}
       uses: actions/setup-java@v4
       with:
-        java-version: '17'
+        java-version: ${{ matrix.java-version }}
         distribution: 'temurin'
 
     # Configure Gradle for optimal use in GitHub Actions, including caching of downloaded dependencies.