chore: update GitHub Actions checkout & setup-node

[MikeMcC399]

Situation

GitHub Actions workflows are using outdated checkout & setup-node actions from the suite https://github.com/actions

Use of actions/setup-node@v5 causes a warning to appear in GitHub Actions logs:

Run actions/setup-node@v5
Attempt to resolve LTS alias from manifest...
(node:2301) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.
(Use `node --trace-deprecation ...` to show where the warning was created)

Change

Update GitHub Actions workflows:

FROM	TO
actions/checkout@v5	actions/checkout@v7
actions/setup-node@v5	actions/setup-node@v7

Checklist

• npm test passes
• tests are included
• documentation is changed or added
• contribution guidelines followed
  here

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.20%. Comparing base (5d23db3) to head (a428fff).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1180   +/-   ##
=======================================
  Coverage   96.20%   96.20%           
=======================================
  Files          29       29           
  Lines        2213     2213           
=======================================
  Hits         2129     2129           
  Misses         84       84           

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