fix(learn): fix link text in coverage article

[gilad-hoshmand-sage]

Description

Fix the wrong display text

[vercel]

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Name	Status	Preview	Updated (UTC)
nodejs-org	✅ Ready (Inspect)	Visit Preview	May 20, 2025 10:58am

[Copilot]

Pull Request Overview

Updates the flag name display for Node.js code coverage to match the correct test runner option.

• Corrects the displayed flag from --experimental-code-coverage to --experimental-test-coverage.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.05%. Comparing base (663fad9) to head (ad5cdd5).

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7761      +/-   ##
==========================================
- Coverage   75.09%   75.05%   -0.04%     
==========================================
  Files          98       98              
  Lines        7914     7914              
  Branches      196      196              
==========================================
- Hits         5943     5940       -3     
- Misses       1970     1973       +3     
  Partials        1        1              

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[AugustinMauroy]

LGTM !

[github-actions]

Lighthouse Results

URL	Performance	Accessibility	Best Practices	SEO	Report
/en	🔴 72	🟢 100	🟢 100	🟢 91	🔗
/en/about	🟢 100	🟢 100	🟢 100	🟠 82	🔗
/en/about/previous-releases	🟢 100	🟢 100	🟢 100	🟠 83	🔗
/en/download	🟢 97	🟢 100	🟢 100	🟢 91	🔗
/en/blog	🟢 100	🟢 100	🟢 96	🟢 92	🔗

[AugustinMauroy]

I'm fast tracking since it not a breaking change and it's fix an "issue" on code example