Raphaël

## Hey, I just made a Pull Request! Add French translation to the Readme #### :heavy_check_mark: Checklist - [ ] A changeset describing the change and affected packages. ([more info](https://github.com/backstage/backstage/blob/master/CONTRIBUTING.md#creating-changesets))...

New additionalTemplate is called when editing keyValue

4

### Prerequisites - [X] I have searched the existing issues - [X] I understand that providing a [SSCCE](http://sscce.org/) example is tremendously useful to the maintainers. - [X] I have read...