Fix typo (bvaughn#1615)

Author: inokawa

source/Masonry/Masonry.js

@@ -40,7 +40,7 @@ type State = {
 const emptyObject = {};
 
 /**
- * Specifies the number of miliseconds during which to disable pointer events while a scroll is in progress.
+ * Specifies the number of milliseconds during which to disable pointer events while a scroll is in progress.
  * This improves performance and makes scrolling smoother.
  */
 export const DEFAULT_SCROLLING_RESET_TIME_INTERVAL = 150;

source/WindowScroller/WindowScroller.js

@@ -65,7 +65,7 @@ type DetectElementResize = {
 };
 
 /**
- * Specifies the number of miliseconds during which to disable pointer events while a scroll is in progress.
+ * Specifies the number of milliseconds during which to disable pointer events while a scroll is in progress.
  * This improves performance and makes scrolling smoother.
  */
 export const IS_SCROLLING_TIMEOUT = 150;