Update README.md

[small1]

Fixed syntax for config.json. Removed a trailing comma.

Pull Request Template

Description

A small fix in the readme for the config.json file.

Fixes #(issue)

Checklist

• [x] My contributions and commit messages follows the style guidelines of this project
• [x] I have made corresponding changes to the documentation
• [x] New and existing unit tests pass locally with my changes
• [x] The Pull Request has an informative and human-readable title
• [x] Changes are limited to a single goal (avoid scope creep)
• [x] Code can be automatically merged (no conflicts)
• [x] I confirm that I have read any Contribution guidelines (CONTRIBUTING)
• [x] I confirm that I wrote and/or have the right to submit the contents of my PR, by agreeing to the Developer Certificate of Origin, by adding a 'sign-off' to my commits

[Ayko1595]

This was nicely spotted! I guess it is because someone copied it directly from the README and created the config.json, which in turn would cause an error(?).

However, we try to maintain the fork process of this repository. We suggest that you use a previously created fork and create a PR from that fork, containing these changes. Additionally, there is no trace of a bug card related to this PR. I do understand that it might seem redundant for such a small issue, but we have a process that we would like to both maintain and test.

[Ayko1595]

I closed this PR but created a PR and added you as co-author. The new PR includes your changes and has been done from a fork instead.