~test old JVM

Author: shanshin

.github/workflows/docs.yml

@@ -30,7 +30,7 @@ jobs:
       - name: Install Java
         uses: actions/setup-java@v4
         with:
-          distribution: 'oracle'
+          distribution: 'zulu'
           java-version: 8
           cache: 'gradle'
       - name: Install Gradle