Fix node version number in deploy site workflow

.github/workflows/deploy-site.yml

@@ -0,0 +1,41 @@
+name: Deploy site
+
+on:
+  push:
+    branches:
+      - main  # Or your default branch
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '22.x'
+
+      - name: Install dependencies
+        run: npm install
+
+      - name: Build Site
+        run: npm run site:build
+
+      - name: Generate GitHub App token
+        id: generate-token
+        uses: tibdex/github-app-token@v2
+        with:
+          app_id: ${{ secrets.APP_ID }}
+          private_key: ${{ secrets.APP_PRIVATE_KEY }}
+
+      - name: Deploy to site gh-pages
+        uses: peaceiris/actions-gh-pages@v4
+        with:
+          external_repository: sparkjsdev/sparkjsdev.github.io
+          publish_branch: main
+          publish_dir: ./site
+          github_token: ${{ steps.generate-token.outputs.token }}
+          commit_message: "Deploy Spark site – ${{ github.sha }}"