Update tiflash/tiflash-configuration.md

tiflash/tiflash-configuration.md

@@ -98,7 +98,7 @@ delta_index_cache_size = 0
 
  ## [storage.io_rate_limit] settings are new in v5.2.0.
  [storage.io_rate_limit]
- ## This configuration item determines whether to limit the I/O traffic, which is disabled by default. This traffic limit in TiFlash is suitable for cloud storage that has disk bandwidth of a small and specific size.
+ ## This configuration item determines whether to limit the I/O traffic, which is disabled by default. This traffic limit in TiFlash is suitable for cloud storage that has the disk bandwidth of a small and specific size.
  ## The total I/O bandwidth for disk reads and writes. The unit is bytes and the default value is 0, which means the I/O traffic is not limited by default.
  # max_bytes_per_sec = 0
  ## max_read_bytes_per_sec and max_write_bytes_per_sec have similar meanings to max_bytes_per_sec. max_read_bytes_per_sec means the total I/O bandwidth for disk reads, and max_write_bytes_per_sec means the total I/O bandwidth for disk writes.