Update README

Author: rav2040

README.md

@@ -28,7 +28,7 @@ A more performant version of `JSON.stringify()`. Strings produced by this functi
 * `toJSON()` methods are completely ignored. However, `Buffer` and `Date` objects will be transformed to represent the same output you would get from `JSON.stringify()`.
 
 ⚠ **Important note:**  
-By default a check will be made on all nested objects and arrays for circular references, and an `Error` will be thrown if one is encountered. Setting the second argument to `false` will disable this check and grant a considerable speed boost, but this should not be done unless it is certain the given object contains no circular references.
+By default a check will be made on all nested objects and arrays for circular references, and an `Error` will be thrown if one is encountered. Setting the *safe* parameter to `false` will disable this check and grant a considerable speed boost, but this should not be done unless it is certain the given object contains no circular references.
 
 #### Parameters