[handbook] Fix path of test in quickstart guide

doc/handbook/2_quickstartguide.tex

@@ -10,8 +10,8 @@ If not given differently in the input files, this is \texttt{build-cmake} as def
 
 \begin{enumerate}
 \item Go to the directory \texttt{build-cmake/test}. There, various test application
-      folders can be found. Let us consider as example \texttt{implicit/test{\_}box2p}:
-\item Enter the folder \texttt{implicit/2p}. Type \texttt{make test{\_}box2p} in order
+      folders can be found. Let us consider as example \texttt{porousmediumflow/2p/implicit/test{\_}box2p}:
+\item Enter the folder \texttt{porousmediumflow/2p/implicit}. Type \texttt{make test{\_}box2p} in order
       to compile the application \texttt{test{\_}box2p}. To run the simulation, type\\
       \texttt{./test{\_}box2p -parameterFile ./test\_box2p.input}\\
       into the console. The parameter \texttt{-parameterFile} specifies that all