Docs: set the correct hyperlink for M. Uhrin paper

The hyperlink for the paper of AiiDA from Martin Uhrin was wrong,
and incorrepointing linking to Iurii's paper on QE-HP.

docs/source/index.md

@@ -106,7 +106,7 @@ If you use this plugin for your research, please cite the following work:
 
 > Sebastiaan. P. Huber, Spyros Zoupanos, Martin Uhrin, Leopold Talirz, Leonid Kahle, Rico Häuselmann, Dominik Gresch, Tiziano Müller, Aliaksandr V. Yakutovich, Casper W. Andersen, Francisco F. Ramirez, Carl S. Adorf, Fernando Gargiulo, Snehal Kumbhar, Elsa Passaro, Conrad Johnston, Andrius Merkys, Andrea Cepellotti, Nicolas Mounet, Nicola Marzari, Boris Kozinsky, and Giovanni Pizzi, [*AiiDA 1.0, a scalable computational infrastructure for automated reproducible workflows and data provenance*](https://doi.org/10.1038/s41597-020-00638-4), Scientific Data **7**, 300 (2020)
 
-> Martin Uhrin, Sebastiaan. P. Huber, Jusong Yu, Nicola Marzari, and Giovanni Pizzi, [*Workflows in AiiDA: Engineering a high-throughput, event-based engine for robust and modular computational workflows*](https://www.sciencedirect.com/science/article/pii/S0010465522001746), Computational Materials Science **187**, 110086 (2021)
+> Martin Uhrin, Sebastiaan. P. Huber, Jusong Yu, Nicola Marzari, and Giovanni Pizzi, [*Workflows in AiiDA: Engineering a high-throughput, event-based engine for robust and modular computational workflows*](https://doi.org/10.1016/j.commatsci.2020.110086), Computational Materials Science **187**, 110086 (2021)
 
 # Acknowledgements