Add mimetic metrics paper (#58)

* add the mimetic metrics paper

* Update index.md

* Update index.md

---------

Co-authored-by: Michael Schlottke-Lakemper <[email protected]>

Author: andrewwinters5000

index.md

@@ -91,6 +91,11 @@ listed above. Author names of Trixi.jl's main developers are in *italics*.
   [![reproduce me!](https://img.shields.io/badge/reproduce-me!-brightgreen)](https://github.com/trixi-framework/paper-2023-upwind)
 
 ### 2024
+* Bach, *Rueda-Ramírez*, Kopriva, *Gassner*,
+  **Mimetic Metrics for the DGSEM**, 2024.\\
+  [![arXiv:2410.14502](https://img.shields.io/badge/arXiv-2410.14502-yellow)](https://arxiv.org/abs/2410.14502)
+  [![reproduce me!](https://img.shields.io/badge/reproduce-me!-brightgreen)](https://github.com/amrueda/paper_2024_mimetic_metrics)
+
 * *Doehring*, *Christmann*, *Schlottke-Lakemper*, *Gassner*, Torrilhon,
   **Fourth-Order Paired-Explicit Runge-Kutta Methods**, 2024.\\
   [![arXiv:2408.05470](https://img.shields.io/badge/arXiv-2408.05470-yellow)](https://arxiv.org/abs/2408.05470)