All-contributors bot does not edit the README.md file

[EdmundGoodman]

When the all-contributors bot is used, it correctly creates a pull request and modifies its internal ".all-contributorsrc" json file, but does not change the README.md file, so the table of contributors cannot be seen in a meaningful way in the repo

[Justanhy]

This is a test: @all-contributors please add @Justanhy to design.

[allcontributors]

@Justanhy

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

[Justanhy]

@all-contributors add @arkamnite to docs, content, maintenance

[allcontributors]

@Justanhy

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