Update README.md

clarify that offset accepts positive numbers in the readme

README.md

@@ -70,7 +70,7 @@ easyScrollDots({
   'fixedNav': true, // Set to true if you have a fixed nav.
   'fixedNavId': 'myNav', // Set to the id of your navigation element if 'fixedNav' is true (easyScrollDots will measure the height of the element).
   'fixedNavUpward': true, // Set to true if your nav is only sticky when the user is scrolling up (requires 'fixedNav' to be true and 'fixedNavId' to be a value).
-  'offset': 30 // Set to the amount of pixels you wish to offset the scroll amount by.
+  'offset': 30 // Set to the amount of pixels you wish to offset the scroll amount by (any positive number).
 });
 ```