Support Node.js 24 for GitHub Actions runtime

[jonathan8devs]

Hi,

when using openfoxes/set-github-variable@v1.4.0, GitHub Actions shows a deprecation warning about the action still running on Node.js 20.

Current behavior

During the workflow run, I get the following warning:

Warning: Node.js 20 actions are deprecated. The following actions are running on Node.js 20 and may not work as expected: openfoxes/set-github-variable@v1.4.0. 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. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Expected behavior

The action should support the current GitHub Actions JavaScript runtime without triggering the Node.js 20 deprecation warning.

Suggestion

It would be great if the action could be updated to use Node.js 24 for the GitHub Actions runtime.