fix(ci): bump website workflow Node.js to 22 for Astro 6.3.1 compat

Author: thedavidweng

.github/workflows/website.yml

@@ -25,7 +25,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: '20'
+          node-version: '22'
           cache: npm
           cache-dependency-path: website/package-lock.json
       - name: Install and build