fix: bump node version in github workflow to 20

This is not a fix, but I need to force a release

.github/workflows/npm-publish.yml

@@ -14,7 +14,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v1
         with:
-          node-version: 18
+          node-version: 20
           registry-url: https://registry.npmjs.org/
           scope: '@chatscope'
       - name: Install dependencies