Add contact information to README

Added a new "Contact" section with email addresses for inquiries. This makes it easier for users to reach out with questions or feedback.

README.md

@@ -136,3 +136,6 @@ conda install -c conda-forge libstdcxx-ng
 
 ## License
 Cooperative Cuisine © 2024 by [Social Cognitive Systems Group](https://scs.techfak.uni-bielefeld.de/) is licensed under [`CC BY-NC-SA 4.0`](https://creativecommons.org/licenses/by-nc-sa/4.0/?ref=chooser-v1) [![License: CC BY-NC-SA 4.0](https://licensebuttons.net/l/by-nc-sa/4.0/80x15.png)](https://creativecommons.org/licenses/by-nc-sa/4.0/)
+
+## Contact
+Feel free to contact us: [fschroeder(at)techfak.de](mailto:fschroeder@techfak.de) and [fheinrich(at)techfak.de](mailto:fheinrich@techfak.de)
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