Summary

Update dependabot-action to run using node24 instead of node20.

Details

Since node20 is deprecated, dependabot runs trigger following deprecation message:

Node.js 20 actions are deprecated. The following actions are running on Node.js 20 and may not work as expected: github/dependabot-action@main. Actions will be forced to run with Node.js 24 by default starting June 2nd, 2026. Please check if updated versions of these actions are available that support Node.js 24. To opt into Node.js 24 now, set the FORCE_JAVASCRIPT_ACTIONS_TO_NODE24=true environment variable on the runner or in your workflow file. Once Node.js 24 becomes the default, you can temporarily opt out by setting ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION=true.

Github post about Node.js 20 deprecation: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

I have updated .nvmrc and action.yml for this PR. Other changes were generated by npm run package.