hierarchy-separator: remove dot from checkings

[yannbf]

Issue: N/A

What Changed

Regarding hierarchy-separators, the dot can be used for normal names and adds confusion. Given it's a pretty old convention I think it's safe to just ignore the dot and check only for pipe instead.

Checklist

Check the ones applicable to your change:

• [ ] Ran yarn update-all
• [x] Tests are updated
• [ ] Documentation is updated

Change Type

Indicate the type of change your pull request is:

• [ ] maintenance
• [ ] documentation
• [x] patch
• [ ] minor
• [ ] major

[github-actions[bot]]

:rocket: PR was released in v0.3.1 :rocket: