Fix NPM Auth

[lightwalker-eth]

Goal: fix https://github.com/namehash/ensnode/actions/runs/20659788398/job/59319660001

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Latest commit: 5c0c416

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Project	Deployment	Review	Updated (UTC)
admin.ensnode.io	Ready	Preview, Comment	Jan 2, 2026 2:34pm
ensnode.io	Ready	Preview, Comment	Jan 2, 2026 2:34pm
ensrainbow.io	Ready	Preview, Comment	Jan 2, 2026 2:34pm

[Copilot]

Pull request overview

This PR fixes NPM authentication issues in GitHub Actions workflows by adding the registry-url parameter to the setup-node action configuration.

Key Changes:

• Added registry-url: 'https://registry.npmjs.org' to the setup-node action configuration in the reusable setup_node_environment composite action

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[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated no new comments.

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