Fix markdown syntax in README

Author: ahocevar

README.md

@@ -18,7 +18,7 @@ parseFont('Open Sans Regular', 16, 1.2);
 
 **Parameters**
 
--  `fonts` **[string](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String)|[Array(https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)]<[string](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String)>** Mapbox GL Style fontstack or single font, e.g. `['Open Sans Regular', 'Arial Unicode MS Regular']` or `'Open Sans Regular'`.
+-  `fonts` **[string](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String)|[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)<[string](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String)>** Mapbox GL Style fontstack or single font, e.g. `['Open Sans Regular', 'Arial Unicode MS Regular']` or `'Open Sans Regular'`.
 
 -  `size` **[number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number)** Font size in pixels.