chore(deps): update node.js to v22.21.0

Author: renovate[bot]

.github/workflows/ci.yml

@@ -49,7 +49,7 @@ jobs:
       - uses: actions/checkout@v5
       - uses: actions/setup-node@v4
         with:
-          node-version: '22.18.0' # specified in the package.json engines.node field
+          node-version: '22.21.0' # specified in the package.json engines.node field
 
       - name: Install dependencies
         run: npm ci

.nvmrc

@@ -1 +1 @@
-22.18.0
+22.21.0