readme: correct capitalizedNativeCase description

Author: qfox

README.md

@@ -374,7 +374,7 @@ Reports invalid types for bunch of tags
 
 In `strictNativeCase` mode ensures that case of natives is the same as in this list: `boolean`, `number`, `string`, `null`, `Object`, `Array`, `Date`, `RegExp`.
 
-In `capitalizedNativeCase` mode ensures that all types are uppercased except function closure format: `{function(...)}`
+In `capitalizedNativeCase` mode ensures that first letter in all native types and primitives is uppercased except the case with `function` in google closure format: `{function(...)}`
 
 Type: `Boolean` or `String`