Add setup Java step for Gradle compatibility

Author: olyagpl

.github/workflows/fortune-demo.yml

@@ -20,6 +20,10 @@ jobs:
     timeout-minutes: 30
     steps:
       - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
+        with:
+          distribution: 'oracle'
+          java-version: '17'
       - uses: graalvm/setup-graalvm@v1
         with:
           java-version: '21'