Update README.md

Author: mevdschee

README.md

@@ -1394,7 +1394,7 @@ The following errors may be reported:
 | 1019  | 403 Forbidden             | Pagination Forbidden 
 | 1020  | 409 Conflict              | User already exists
 | 1021  | 422 Unprocessable entity  | Password too short
-| 1022  | 422 Unprocessable entity  | Username is empty;
+| 1022  | 422 Unprocessable entity  | Username is empty
 | 9999  | 500 Internal server error | Unknown error 
 
 The following JSON structure is used: