Update joss_paper/paper.bib

Co-authored-by: Marie Weiel <marie.weiel@kit.edu>

Author: MarleneBusch

joss_paper/paper.bib

@@ -117,7 +117,7 @@ @article{Kuhl:2024
 
 @article{Lewen:2025,
     publisher = {Elsevier},
-    title = {Inverse Deep Learning Raytracing for heliostat surface prediction},
+    title = {Inverse Deep Learning Raytracing for Heliostat Surface Prediction},
     author = {Lewen, Jan and Parmann, Max and Maldonado Quinto, Daniel and Jitsev, Jenia and Cherti, Mehdi and Pitz-Paal, Robert},
     journal = {Solar Energy},
     year = {2025},