docs(radiobutton): correct two misspellings on demo (#11667)

Author: RQF7

src/components/radioButton/demoMultiColumn/script.js

@@ -5,13 +5,13 @@ angular
 
     self.contacts = [{
       'id': 1,
-      'fullName': 'Maria Guadalupe',
+      'fullName': 'María Guadalupe',
       'lastName': 'Guadalupe',
       'title': "CEO, Found"
     }, {
       'id': 2,
-      'fullName': 'Gabriel García Marquéz',
-      'lastName': 'Marquéz',
+      'fullName': 'Gabriel García Márquez',
+      'lastName': 'Márquez',
       'title': "VP Sales & Marketing"
     }, {
       'id': 3,