Update Node.js version in release workflow

Author: aparnajyothi-y

.github/workflows/release-assets.yml

@@ -8,4 +8,4 @@ jobs:
       - name: Setup Node
         uses: actions/setup-node@a0853c24544627f65ddf259abe73b1d18a591444
         with:
-          node-version: '20.16.0'
+          node-version: '21'