✏️ Fix typo

Author: Guldem

README.md

@@ -257,7 +257,7 @@ parameterizedTest('Example of CSV data',
 ```
 
 ### Testing with `Future.error` values
-When using `Future.error` directly in your parameterized test values, this might leads to not executing tests at all. In order to handle this correctly your can provide the `Future` as a callback function.  
+When using `Future.error` directly in your parameterized test values, this might lead to not executing tests at all. In order to handle this correctly your can provide the `Future` as a callback function.  
 But also need to make sure that the when the future is awaited its also catch. `Future.error` will throw the provided object. See [23](https://github.com/DutchCodingCompany/parameterized_test/issues/23) for more information.
 
 ## Additional information 💡