extend contributor list

doc/chapter/6contributors.tex

@@ -23,6 +23,8 @@
         \rowcolor{gray!25}
         Creative Director & Kolja Samuel Strohm \\
         Localization Producer & Eren Bora Yilmaz \\
+        \rowcolor{gray!25}
+        Manual Code Formatting & Kolja Samuel Strohm \\
         \\\\\rowcolor{gray!25}
 		Special Thanks & Jens Burmeister \\\\
 	\end{longtable}