Update topBar-buttons.md (#3348)

docs/docs/topBar-buttons.md

   title: 'Button one',
   enabled: true,
   disableIconTint: false,
-  tintColor: 'red',
+  color: 'red',
   disabledColor: 'black',
   testID: 'buttonOneTestID'
 }
     rightButtons: []
   }
 });
-```
+```