Remove unnecessary HTML tags from README badges.

Removed redundant `<div>` tags used for alignment in the README. This simplifies the document structure while maintaining the functionality and appearance of the badges.

README.md

-<div align="center">
 [![Docs](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/cooperative-cuisine/badges/main/pipeline.svg?key_text=Docs&key_width=35)](https://scs.pages.ub.uni-bielefeld.de/cocosy/cooperative-cuisine/cooperative_cuisine.html)
-</div>
-<div align="center">
 [![Main Pipeline Report](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/cooperative-cuisine/badges/main/pipeline.svg?key_text=Main+Pipeline&key_width=82)](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/cooperative-cuisine/-/pipelines/latest/)
 [![Main Coverage Report](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/cooperative-cuisine/badges/main/coverage.svg?job=pytest&key_text=Main+Test+Coverage&key_width=114)](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/cooperative-cuisine/-/pipelines/latest/)
 ![Dev Pipeline Report](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/cooperative-cuisine/badges/dev/pipeline.svg?key_text=Dev+Pipeline&key_width=80)
 ![Dev Coverage Report](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/cooperative-cuisine/badges/dev/coverage.svg?job=pytest&key_text=Dev+Test+Coverage&key_width=112)
-</div>
 
 # Cooperative Cuisine Environment