Update readme.md

Co-Authored-By: szmarczak <36894700+szmarczak@users.noreply.github.com>

readme.md

@@ -182,7 +182,7 @@ JSON body. The `Content-Type` header will be set to `application/json` if it's n
 
 Type: `unknown`
 
-User data. In the opposite to other options, `userData` is not enumerable.
+User data. In contrast to other options, `userData` is not enumerable.
 
 ###### responseType