Update publish.yml

Author: erezrokah

.github/workflows/publish.yml

@@ -17,7 +17,7 @@ jobs:
       - uses: actions/setup-java@v5
         with:
           distribution: "temurin"
-          java-version: "18"
+          java-version: "21"
           cache: "gradle"
       - name: Validate Gradle wrapper
         uses: gradle/actions/wrapper-validation@49ec880f92204d92aac59e81f28195de48b4a7fa