updated docs

docs/docs/main_menu.xml

@@ -166,6 +166,10 @@
                   <name>Webcam_Face_Pose_Estimation</name>
                   <link>webcam_face_pose_ex.cpp.html</link>
                </item>
+               <item>
+                  <name>Linear_Assignment_Problems</name>
+                  <link>max_cost_assignment_ex.cpp.html</link>
+               </item>
                <item>
                   <name>Learning_to_Track</name>
                   <link>learning_to_track_ex.cpp.html</link>

docs/docs/optimization.xml

@@ -536,6 +536,7 @@ subject to the following constraint:
 
          </description>
          <examples>
+            <example>max_cost_assignment_ex.cpp.html</example>
             <example>max_cost_assignment.py.html</example>
          </examples>