non matching contribution rules makes PR have errors

[tenuki]

Steps to reproduce

What steps will reproduce the problem?

contribution rules at: https://github.com/GoogleChrome/puppeteer/blob/master/CONTRIBUTING.md exemplify:

fix(Page): fix page.pizza method

This patch fixes page.pizza so that it works with iframes.

Fixes #123, Fixes #234

BREAKING CHANGE: page.pizza now delivers pizza at home by default.
To deliver to a different location, use "deliver" option:
  `page.pizza({deliver: 'work'})`.

However after doing that and creating a pull request, commitlint is checking something different:

Pull request title

    fix(BrowserFetcher): fix httpRequest when using proxy against http HOST

Commitlint results

    ❌ scope must be lowerCase [scope-case]
    
Expected PR title format is: {type}({optional-scope}): {subject}

Full docs of commitlint rules

What is the expected result?

Not to give an error for what was not specified!

What happens instead?

Anyone discover new rules when it is too late.