ci: update GitHub Actions to use current versions

- actions/checkout: v3 → v4
- actions/setup-node: v3 → v4
- actions/configure-pages: v3 → v4
- actions/upload-pages-artifact: v1 → v2 (fixed deprecated action)
- actions/deploy-pages: v2 → v3

🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>

Author: dtinth

.github/workflows/deploy.yml

@@ -19,13 +19,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: pnpm
         uses: pnpm/action-setup@v2
         with:
           version: 9
       - name: node
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
           node-version: 22
           cache: pnpm
@@ -34,13 +34,13 @@ jobs:
       - name: build
         run: pnpm build
       - name: configure
-        uses: actions/configure-pages@v3
+        uses: actions/configure-pages@v4
       - name: upload
-        uses: actions/upload-pages-artifact@v1
+        uses: actions/upload-pages-artifact@v2
         with:
           path: dist
       - name: deploy
         id: deployment
-        uses: actions/deploy-pages@v2
+        uses: actions/deploy-pages@v3
       - name: 'logging'
         run: echo "Deployed at ${{ steps.deployment.outputs.page_url }}"