Upgrade workflow

Author: melix

.github/workflows/gradle.yml

@@ -15,15 +15,15 @@ jobs:
     strategy:
       fail-fast: false
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 1
 
       - name: Set up JDK
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v5
         with:
           distribution: 'temurin'
-          java-version: '17'
+          java-version: '21'
 
       - name: Install Graphviz
         uses: tlylt/install-graphviz@v1
@@ -70,8 +70,9 @@ jobs:
               build/reports/**/*
 
       - name: Deploy to GH Pages 🚀
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         if: ${{ github.ref == 'refs/heads/main' }}
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: build/graph
+          force_orphan: true