Add MBTI as adopter (#2265)

Added Mercedes-Benz Tech Innovation to the list of adopters, as we use the project in at least one of our projects.

Benjamin Bertow benjamin.bertow@mercedes-benz.com, Mercedes-Benz Tech Innovation GmbH.
https://github.com/mercedes-benz/foss/blob/master/PROVIDER_INFORMATION.md

Signed-off-by: Benny <benjamin.bertow@mercedes-benz.com>

ADOPTERS.md

@@ -9,6 +9,7 @@
 - [Form3](https://www.form3.tech/)
 - [Heureka Group](https://heureka.group)
 - [K8S Website Infra](https://k8s.io/)
+- [Mercedes-Benz Tech Innovation](https://www.mercedes-benz-techinnovation.com/)
 - [Mixpanel](https://mixpanel.com)
 - [OpenClassrooms](https://openclassrooms.com)
 - [Pento](https://www.pento.io/)