Added new historical metrics to the README file

README.md

@@ -66,6 +66,8 @@ These are the metrics this program exports, assuming the `METRICS_PREFIX` is `qb
 | `qbittorrent_dht_nodes`                                         | gauge    | Number of DHT nodes connected to. |
 | `qbittorrent_dl_info_data`                                      | counter  | Data downloaded since the server started, in bytes. |
 | `qbittorrent_up_info_data`                                      | counter  | Data uploaded since the server started, in bytes. |
+| `qbittorrent_alltime_dl_total`                                  | counter  | Total historical data downloaded, in bytes. |
+| `qbittorrent_alltime_ul_total`                                  | counter  | Total historical data uploaded, in bytes. |
 | `qbittorrent_torrents_count`                                    | gauge    | Number of torrents for each `category` and `status`. Example: `qbittorrent_torrents_count{category="movies",status="downloading"}`|
 
 ## Screenshot