Fix disk I/O usage metrics

src/widgets/disk.rs

@@ -82,8 +82,8 @@ impl UpdatableWidget for DiskWidget<'_> {
 					.remove(&partition.device().replace("/dev/", ""))
 					.unwrap_or_default();
 
-				let bytes_read = io_counters.read_count();
-				let bytes_written = io_counters.read_count();
+				let bytes_read = io_counters.read_bytes();
+				let bytes_written = io_counters.write_bytes();
 				// Here we use an `unwrap_or_default` for when we are adding a new disk partition
 				// that is loaded when on ytop is already running.
 				let (bytes_read_recently, bytes_written_recently) = self