ci: pin node for jsdom tests

.gitea/workflows/deploy.yml

@@ -13,6 +13,12 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
 
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "22"
+          cache: npm
+
       - name: Install dependencies
         run: npm ci