- updated Java version to 11.

- replaced Apache HTTP client code with `Java.net.http.HttpClient`

.github/workflows/publish-javadoc.yml

@@ -34,15 +34,12 @@ jobs:
       - name: Set up JDK 8
         uses: actions/setup-java@v3
         with:
-          java-version: '8'
-          distribution: 'temurin'
+          java-version: '11'
+          distribution: 'adopt-hotspot'
           server-id: github # Value of the distributionManagement/repository/id field of the pom.xml
           settings-path: ${{ github.workspace }} # location for the settings.xml file
       - name: Build with Maven
         run: mvn -U -B clean package --file pom.xml
-
-      #      - name: Checkout
-      #        uses: actions/checkout@v3
       - name: Setup Pages
         uses: actions/configure-pages@v3
       - name: Upload artifact