Update actions/upload-pages-artifact action to v4

Author: renovate[bot]

.github/workflows/nextjs.yml

@@ -76,7 +76,7 @@ jobs:
       - name: Build with Next.js
         run: ${{ steps.detect-package-manager.outputs.runner }} next build
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@v3
+        uses: actions/upload-pages-artifact@v4
         with:
           path: ./out