fix location of pdf

paper.tex

@@ -452,7 +452,7 @@ \section{Existing Implementations}
 
 \begin{figure}
 \centering
-\includegraphics[width=\textwidth]{./group_composition_plot/pdf/group_composition_plot_the_fantastic_four.pdf}
+\includegraphics[width=\textwidth]{./group_composition_plot/group_composition_plot_the_fantastic_four.pdf}
 \caption{National and international examples of RSE units and their service portfolio: Heidelberg and Princeton offer development services, whereas Jena and Reading focus mostly on teaching and consultation services.}
 \label{fig:survey}
 \end{figure}