Update key width in badge URLs

The key width value in the badge URLs was decreased from 130 to 80, resulting in a cleaner presentation of the project README file. The update affects both the main and dev pipelines and coverage report badges.

README.md

-[![coverage report](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/badges/main/pipeline.svg?job=pytest&key_text=Main+Pipeline&key_width=130)](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/-/commits/main)
-[![coverage report](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/badges/main/coverage.svg?job=pytest&key_text=Main+Coverage&key_width=130)](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/-/commits/main)
-[![coverage report](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/badges/dev/pipeline.svg?job=pytest&key_text=Dev+Pipeline&key_width=130)](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/-/commits/dev)
-[![coverage report](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/badges/dev/coverage.svg?job=pytest&key_text=Dev+Coverage&key_width=130)](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/-/commits/dev)
+[![coverage report](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/badges/main/pipeline.svg?job=pytest&key_text=Main+Pipeline&key_width=80)](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/-/commits/main)
+[![coverage report](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/badges/main/coverage.svg?job=pytest&key_text=Main+Coverage&key_width=80)](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/-/commits/main)
+[![coverage report](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/badges/dev/pipeline.svg?job=pytest&key_text=Dev+Pipeline&key_width=80)](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/-/commits/dev)
+[![coverage report](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/badges/dev/coverage.svg?job=pytest&key_text=Dev+Coverage&key_width=80)](https://gitlab.ub.uni-bielefeld.de/scs/cocosy/overcooked-simulator/-/commits/dev)
 
 # Cooperative Cuisine Environment