Update prefer-number-is-integer.md

docs/rules/prefer-number-is-integer.md

@@ -2,7 +2,7 @@
 
 Enforces the use of [Number.isInteger()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isInteger) for checking if a number is an integer.
 
-These different implementations have slightly different behaviours.
+These different implementations have slightly different behaviors.
 
 For example:
 
@@ -23,7 +23,7 @@ Math.round(value) === value
 parseInt(value, 10) === value
 ~~value === value
 
-// these will all trigger the lint warning
+// These will all trigger the lint warning
 _.isInteger(value);
 lodash.isInteger(value);
 underscore.isInteger(value);