📄 Minor documentation discrepancy around default_author

[keithrfung]

Documentation Fix

Small minor documentation fix around this section. Noticed a slight discrepency in the words vs the code.
https://github.com/EndBug/add-and-commit/blob/main/README.md#different-authorcommitter-configurations

Original

If you don't want to use your GitHub username for the CI commits, you can use the default_author option to make it appear as if it was made by "github-actions"

FIxed

If you don't want to use your GitHub username for the CI commits, you can use the default_author option to make it appear as if it was made by GitHub Actions by setting github_actions

[EndBug]

Thanks!

@all-contributors please add @keithrfung for their docs contribution

[allcontributors]

@EndBug

I've put up a pull request to add @keithrfung! 🎉