chore(deps-dev): bump npm from 11.6.2 to 11.12.1

[caugner]

Summary

Bumps npm from 11.6.2 to 11.12.1, and requires npm 11.8.0 or later, to avoid accidental package-lock.json changes by contributors (npm 11.6.2 and 11.8.0 produce different lock files, due to a bug in npm 11.6.2).

Test results and supporting details

Note: Unlike mdn/content#42778, I'm not bumping the Node version in .nvmrc, because nvm install / nvm use already install the latest version matching the version constraint by default.

Related issues

Triggered by #29474 (comment).

Essentially the same as mdn/content#42778.

[github-actions]

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[LeoMcA]

I'm not bumping the Node version in .nvmrc, because nvm install / nvm use already install the latest version matching the version constraint by default.

I believe nvm use will use an outdated version (matching the version constraint), if nvm install isn't re-run (which is a rare thing for me to do).

[caugner]

I'm not bumping the Node version in .nvmrc, because nvm install / nvm use already install the latest version matching the version constraint by default.

I believe nvm use will use an outdated version (matching the version constraint), if nvm install isn't re-run (which is a rare thing for me to do).

Good point, I will push a commit that references the latest Node v24 version explicitly.