fix: update node version in release pipeline

Author: christian-bromann

.github/workflows/npm-publish.yml

@@ -29,7 +29,7 @@ jobs:
       - name: Setup Node version
         uses: actions/setup-node@v4
         with:
-          node-version: 16
+          node-version: 20.x
       - name: Install dependencies
         run: npm ci
       - run: npm run build
@@ -50,7 +50,7 @@ jobs:
       - name: Setup Node version
         uses: actions/setup-node@v4
         with:
-          node-version: 16
+          node-version: 20.x
           registry-url: https://registry.npmjs.org/
       - name: Setup Git
         run: |