fix publish workflow

Specifying a registry-url is necessary to have the NODE_AUTH_TOKEN env
var work.

https://docs.github.com/en/actions/publishing-packages/publishing-nodejs-packages#about-package-configuration

.github/workflows/publish.yml

@@ -20,6 +20,7 @@ jobs:
         with:
           node-version: '20'
           cache: 'npm'
+          registry-url: 'https://registry.npmjs.org'
 
       - name: Install dependencies
         run: npm ci