Use Java 23 for the GHA build

Author: jonatan-ivanov

.github/workflows/gradle.yml

@@ -16,8 +16,7 @@ jobs:
       with:
         distribution: 'liberica'
         java-version: |
-          22
-          21
+          23
     - name: Validate Gradle wrapper
       uses: gradle/wrapper-validation-action@v1
     - name: Build with Gradle