broken links reported in build

[rabbah]

warn Docusaurus found broken links!
Please check the pages of your site in the list bellow, and make sure you don't reference any path that does not exist.
Note: it's possible to ignore broken links with the 'onBrokenLinks' Docusaurus configuration, and let the build pass.
Exhaustive list of all broken links found:
- On source page path = /command-summary:
  -> linking to common-flags.md (resolved as: /common-flags.md)

[JamieDawson]

The issue is on a link in command-summary.md on line 9.

[common-flags.md](common-flags.md) needs to be changed to [common-flags.md](flags). I'll make a pull request.

[JamieDawson]

Pull request created. link