docs: quote npm package name in changelog

[MikeMcC399]

Situation

The workflow workflows/check-markdown.yml reports a false positive bad link:

FILE: CHANGELOG.md
  [✓] https://github.com/cypress-io/github-action
  [✓] https://github.com/cypress-io/github-action/releases
  [✖] mailto:cache@4.0.0
  [✓] https://github.com/cypress-io/github-action/tree/v5
  [✓] https://on.cypress.io/module-api

  ERROR: 1 dead links found!

  5 links checked.
  [✖] mailto:cache@4.0.0 → Status: 400

Change

In the CHANGELOG.md add code backticks to @actions/cache@4.0.0 to avoid the npm package name being interpreted as an e-mail address by markdown-link-check.

Verify

npm run check:markdown-links

and confirm that no dead links are reported.

[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.

[MikeMcC399]

There's a known bug in markdown-link-check@3.13.7 where it always returns success (0) even if it finds dead links, explaining why this issue went unnoticed for months. It was a false positive, so actually there was no dead link, but even so it would have been nice to have been informed through the workflow failing. I'll monitor markdown-link-check for a fix.

[github-actions]

🎉 This PR is included in version 6.10.3 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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