MAI-56: drop cache:'npm' and bump node 20→24 in generated GH Actions bump workflow

[vsmash]

Ticket

https://velvary.atlassian.net/browse/MAI-56

Problem

maiass --create-gh-action generated .github/workflows/maiass-version-bump.yml with an actions/setup-node@v4 step that set cache: 'npm'. For projects with no Node lock file (e.g. WordPress/PHP plugins), setup-node fails before maiass runs:

Dependencies lock file is not found ... package-lock.json, npm-shrinkwrap.json, yarn.lock

The generated workflow only does npm install -g maiass, which needs no project-level npm cache, so the cache was pointless. The generated node-version: '20' is also deprecated on GitHub runners.

Fix

In the template templates/ci/github-version-bump.yml (consumed by lib/ci-templates.js createGithubAction()):

• Removed cache: 'npm' from the generated setup-node step (added an explanatory comment).
• Bumped generated node-version from '20' to '24'.

Verification

• Ran maiass --create-gh-action in a clean temp dir → generated workflow now has node-version: '24' and no cache: key.
• node maiass.mjs --help works.

Scope note

Only the generated template was changed. This repo's own .github/workflows/version-bump.yml mirrors the template but has a real package-lock.json, so cache: 'npm' works there — left untouched, out of scope for this ticket.

🤖 Generated with Claude Code