chore: exclude npm registry from link check

[MikeMcC399]

Situation

Executing npm run check:markdown results in errors checking the ./factory/README.md document:

  ERROR: 3 dead links found!
  [✖] https://www.npmjs.com/package/yarn → Status: 403
  [✖] https://www.npmjs.com/package/cypress → Status: 403
  [✖] https://www.npmjs.com/package/geckodriver → Status: 403

These are HTTP 403 Forbidden errors, resulting from the npm registry refusing to honor non-browser requests.

Change

• Add ^https://www.npmjs.com to ignorePatterns in markdownLinkConfig.json

• Remove the existing "pattern": "^#S*". This is not necessary.

Verification

npm ci
npm run check:markdown

Confirm that there are no link issues reported.

Comment

Due to a bug in markdown-link-check the return code is always set to success. Once this is fixed, the check:markdown script could be added to CI to report on link issues.

[cypress-app-bot]

• Create a Draft Pull Request if your PR is not ready for review. Mark the PR as Ready for Review when you're ready for a Cypress team member to review the PR.