Improve English

Author: alexrudall

CHANGELOG.md

@@ -9,7 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
-- Add validation of JSONL files to make it easier to debug when uploading files.
+- Add validation of JSONL files to make it easier to debug during upload.
 
 ## [1.2.0] - 2021-04-08