use Zulu instead of Temurin.

Switch the Java distribution in CI from Temurin to Zulu.
The reason is that the current macos-latest runs on macOS 14 with arm64 architecture, but Temurin doesn’t offer an arm64 build of Java 8.

Author: eichisanden

Diff for: .github/workflows/ci.yaml

@@ -46,7 +46,7 @@ jobs:
       - name: Setup JDK
         uses: actions/setup-java@9704b39bf258b59bc04b50fa2dd55e9ed76b47a8 # v4.1.0
         with:
-          distribution: temurin
+          distribution: zulu
           java-version: 8
 
       - name: Setup Gradle