Fix typo (min->max) in shading language reference

learning/features/shading/shading_language.rst

@@ -179,7 +179,7 @@ follows:
 +-----------------------------------------------------------------------+---------------------------------------------+
 | vec\_type *min* ( vec\_type,vec\_type )                               | Minimum                                     |
 +-----------------------------------------------------------------------+---------------------------------------------+
-| vec\_type *min* ( vec\_type,vec\_type )                               | Maximum                                     |
+| vec\_type *max* ( vec\_type,vec\_type )                               | Maximum                                     |
 +-----------------------------------------------------------------------+---------------------------------------------+
 | vec\_type *clamp* ( vec\_type value,vec\_type min, vec\_type max )    | Clamp to Min-Max                            |
 +-----------------------------------------------------------------------+---------------------------------------------+