fix: plugins section id no whitespace

[MikeMcC399]

This PR ensures that h2 section ids generated for the Plugins list conform to HTML rules which disallow whitespace in an id attribute.

For instance, the Section "Development Tools" was generated as <h2 id="Development Tools">, which is illegal due to the embedded whitespace between the two words.

h2 section ids are now generated by replacing space with hyphen "-" and converting to lower case.

Verification

1. Execute npm run build
2. View the generated HTML dist/plugins/index.html
3. Search for <h2 id=" strings and confirm that ids are lower case and contain no whitespace.

Reference

• https://developer.mozilla.org/en-US/docs/Web/HTML/Global_attributes/id

[netlify]

👷 Deploy request for cypress-docs pending review.

Visit the deploys page to approve it

Name	Link
🔨 Latest commit	ac41423

[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.