Change heading levels in docs landing page

docs/index.md

@@ -122,9 +122,7 @@ APEBench encapsulates the entire pipeline of training and evaluating an
 autoregressive neural emulator in a scenario. A scenario is a callable
 dataclass.
 
-## Acknowledgements
-
-### Citation
+## Citation
 
 This package was developed as part of the [APEBench paper
 (arxiv.org/abs/2411.00180)](https://arxiv.org/abs/2411.00180) (accepted at
@@ -143,11 +141,11 @@ consider citing it:
 
 (Feel free to also give the project a star on GitHub if you like it.)
 
-### Funding
+## Funding
 
 The main author (Felix Koehler) is a PhD student in the group of [Prof. Thuerey at TUM](https://ge.in.tum.de/) and his research is funded by the [Munich Center for Machine Learning](https://mcml.ai/).
 
-### License
+## License
 
 MIT, see [here](https://github.com/Ceyron/apebench/blob/main/LICENSE.txt)