ci: bump Node to 24.x to fix release workflow

[dohaki]

Summary

• Bump both workflows from Node 22 → 24
• Remove the Update npm step in release.yml; Node 24 ships with npm 11.x, which already supports trusted publishing

Why

The release run on master is failing at npm install -g npm@latest:

npm error code MODULE_NOT_FOUND
npm error Cannot find module 'promise-retry'
npm error - .../npm/node_modules/@npmcli/arborist/lib/arborist/rebuild.js

This is an npm self-upgrade race: arborist's rebuild step re-requires promise-retry while the new npm is overwriting those same files in the global prefix. Bumping Node to 24 removes the need to self-upgrade entirely, since the bundled npm already meets the trusted-publishing minimum (≥ 11.5.1).

Failing run: https://github.com/across-protocol/toolkit/actions/runs/24985150975/job/73156684308

Test plan

• Build Lint & Test workflow passes on this PR (validates Node 24 for the regular CI path)
• After merge, confirm the Release workflow on master gets past the previously-failing step

🤖 Generated with Claude Code

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Project	Deployment	Actions	Updated (UTC)
toolkit-example	Ready	Preview, Comment	Apr 27, 2026 8:56am

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