chore: update codecov/codecov-action to v7.0.0

[MikeMcC399]

• closes Node.js 20 deprecation warnings (actions/github-script) in nodejs.yml CI workflow #1120

Situation

The Node.js CI workflow nodejs.yml shows multiple deprecation warnings similar to the following:

Test / test (24, macos-latest)
Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/github-script@60a0d83. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Change

Update nodejs.yml to use codecov/codecov-action@v7.0.0 (codecov/codecov-action@fb8b358) (current latest).

Checklist

• npm test passes
• contribution guidelines followed
  here

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.33%. Comparing base (1c00f12) to head (4527285).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1121   +/-   ##
=======================================
  Coverage   96.33%   96.33%           
=======================================
  Files          29       29           
  Lines        2213     2213           
=======================================
  Hits         2132     2132           
  Misses         81       81           

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[MikeMcC399]

@targos

Although there were failures a couple of days ago on Windows, I re-ran CI twice today, and each time it succeeded. I also ran tests locally and successfully on Windows 11 25H2, so I think this PR is ready to merge.