Fixing outdated git cloning instruction

docs/user-guide/installation/source.tex

@@ -29,7 +29,7 @@ There are two ways to obtain the source code for \nekpp:
 	\item Using authenticated access. This will allow you to directly contribute
 	back into the code.
     \begin{lstlisting}[style=BashInputStyle]
-        git clone git@gitlab.nektar.info:nektar.git nektar++
+        git clone git@gitlab.nektar.info:nektar/nektar.git nektar++
     \end{lstlisting}
     \begin{tipbox}
     You can easily switch to using the authenticated access from anonymous