README: fix URL_PREFIX description

Signed-off-by: Roman Khimov <[email protected]>

Author: roman-khimov

README.md

@@ -71,7 +71,7 @@ can be used to autodelete objects that don't need to be stored forever (like log
 | `PATH_TO_FILES_DIR` | Path to the directory with the files to be pushed                                                                                                       | **Yes**  | N/A     |
 | `LIFETIME`          | Number of epochs (for mainnet 1 epoch is ~1 hour) for object to stay valid (it's deleted afterwards), "0" means "unlimited"                             | **No**   | 0       |
 | `NEOFS_ATTRIBUTES`  | User attributes in form of Key1=Value1,Key2=Value2. By default, each object contains attributes of relative path to the file and MIME type of the file. | **No**   | N/A     |
-| `URL_PREFIX`        | Prefix to the url address for each of the files(objects)                                                                                                | **No**   | N/A     |
+| `URL_PREFIX`        | Prefix added to the URL address in OUTPUT_CONTAINER_URL                                                                                                 | **No**   | N/A     |
 
 ## Output