Fix typo in correlation.txt

doc/usermanual/chapters/correlation.tex

@@ -25,7 +25,7 @@
 
 \begin{figure}[h]
         \centering
-        \includegraphics[width=0.66\textwidth]{datadriven.png} 
+        \includegraphics[width=0.66\textwidth]{datadrivendevice.png} 
         \caption{text here}
         \label{fig:datadriven}
 \end{figure}
@@ -34,7 +34,7 @@
 
 \begin{figure}[h]
         \centering
-        \includegraphics[width=0.66\textwidth]{datadrivenandframebaseddevice.png} 
+        \includegraphics[width=0.66\textwidth]{datadrivenandframebased.png} 
         \caption{text here}
         \label{fig:datadrivenandframebased}
 \end{figure}