constrain override files regex

[yannbf]

Issue: #

What Changed

.stories.* was too broad and would affect files like .stories.json which is not what we want at the moment.

Checklist

Check the ones applicable to your change:

• [x] Ran yarn update-all
• [ ] 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 v0.3.4 :rocket: