Update required Java version

Author: phpfui

.github/workflows/tests.yml

@@ -35,7 +35,7 @@ jobs:
         uses: actions/setup-java@v5
         with:
           distribution: 'temurin'
-          java-version: '11'
+          java-version: '25'
 
       - name: Download vnu checker
         run: wget https://github.com/validator/validator/releases/download/latest/vnu.jar