fix typo getplotloffline ---> getplotlyoffline

Author: BRONSOLO

plotly/plotly_offline_aux/plotlyoffline.m

@@ -15,7 +15,7 @@
         bundle = fileread(bundle_file); 
     catch
         error(['Error reading: %s.\nPlease download the required ', ... 
-               'dependencies using: >>getplotloffline \n', ...
+               'dependencies using: >>getplotlyoffline \n', ...
                'or contact [email protected] for assistance.'], ...
                bundle_file);   
     end