DOC: Improve formatting of an ITK class in the Contributors section.

Use proper LaTeX formatting when mentioning an ITK class in the
`Contributors` section.

Author: Jon Haitz Legarreta

SoftwareGuide/Latex/04-Contributors.tex

@@ -57,7 +57,7 @@ \chapter*{Contributors}
 hybrid segmentation methods.
 
 {\bf Mark Foskey} contributed the examples on the
-AutomaticTopologyMeshSource class.
+ \doxygen{AutomaticTopologyMeshSource} class.
 
 {\bf Mathieu Malaterre} contributed the entire section on the description and
 use of DICOM readers and writers based on the GDCM library. He also contributed