fix(sync-utils): Change utils to match main repo and learn

[ojeytonwilliams]

Description

Changes the dasherize function to match the learn and freeCodeCamp repos

Pre-Submission Checklist

• Your pull request targets the dev branch.
• Branch starts with either fix/, feature/, or translate/ (e.g. fix/challenge-tests)
• All new and existing tests pass the command npm test.
• Use npm run commit to generate a conventional commit message.
  Learn more here: https://conventionalcommits.org/#why-use-conventional-commits
• The changes were done locally on your machine and NOT GitHub web interface.
  If they were done on the web interface you have ensured that you are creating conventional commit messages.

Checklist:

• Tested changes locally.
• Addressed currently open issue (replace XXXXX with an issue no in next line)

Closes #285