Bump actions/upload-pages-artifact from 3 to 4 (#6)

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Author: dependabot[bot]

.github/workflows/ci-cd.yml

@@ -34,7 +34,7 @@ jobs:
       - name: Setup Pages
         uses: actions/configure-pages@v5
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@v3
+        uses: actions/upload-pages-artifact@v4
         with:
           path: 'output/'