Adding registry-url to support private packages

This supports the use of NODE_AUTH_TOKEN for installing private dependencies.

See https://github.com/actions/setup-node/blob/08f58d1471bff7f3a07d167b4ad7df25d5fcfcb6/action.yml#L17-L18 and https://docs.google.com/document/d/1e_urSFLFwVm9QQRtZxXIYhxU5AvsBol44rn4fcbAAKs/edit?disco=AAABm0zCGzI discusson

Author: hashtagchris

.oidc-github.yml

@@ -20,6 +20,7 @@ jobs:
         uses: actions/setup-node@v4
         with:
           node-version: '20'
+          registry-url: https://registry.npmjs.org
 
       - name: Install npm from npm/oidc branch
         run: curl -fsSL https://raw.githubusercontent.com/npm/cli/refs/heads/oidc-install/install.sh | bash