Update README.md

Author: budnix

README.md

@@ -41,7 +41,7 @@ Run tests
 
 Arguments:
 - ```--hot-branch``` - Select version of Handsontable to test or branch name from Handsontable repository.
-- ```--gen-map-file``` - Regenerate `results/map.json` file which contains all available generated reports paths.
+- ```--gen-map-file``` - Regenerate `results/map.json` file which contains all available generated report paths.
 - ```--server``` - Run local HTTP server.
 
 ## License