Update action to use node 24

[wilkinsocks]

Which issue(s) does this change fix?

Github actions reports the following warning currently:

Node.js 20 actions are deprecated. The following actions are running on Node.js 20 and may not work as expected: aws-actions/setup-sam@v2. Actions will be forced to run with Node.js 24 by default starting June 2nd, 2026. Node.js 20 will be removed from the runner on September 16th, 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/

Description

This PR updates the action to run on node.js 24 in order to be compatible with Github actions.

• Updated action.yml to use node24
• Updated workflow to match
• On node24, Ran npm update and ran npm run all - all tests passing
• Updated tag to v3 as this has moved to node24

Checklist

• Change is backward compatible (if not, add a new input or update major version)
• Run npm run all
• Update tests (if necessary)

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 License.

[wilkinsocks]

Removed Python 3.9 from the Github actions tests because Python 3.9 is now end of life.
All the tests for 3.9 were failing when it tries to install on the official installer. Official installer requires Python >=3.10.

[reedham-aws]

Minor nit, but otherwise LGTM!

[mthkbarber]

Minor nit, but otherwise LGTM!

@reedham-aws any chances you are able to nudge someone for a second approval for this to be mergeable?