fix: upgrade Node.js to 22 for Astro compatibility in deploy workflow

Author: raphaelmansuy

.github/workflows/deploy-site.yml

@@ -35,7 +35,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '20'
+          node-version: '22'
           cache: 'pnpm'
           cache-dependency-path: site/pnpm-lock.yaml