Auto-sync: Update Chinese docs from English PR

Synced from: pingcap/docs#22688
Target PR: pingcap#21508
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releases/release-8.5.4.md

@@ -86,6 +86,7 @@ TiDB 版本：8.5.4
 | TiKV | <ul><li>[`region-compact-check-interval`](https://docs.pingcap.com/zh/tidb/v8.5/tikv-configuration-file#region-compact-check-interval)</li><li>[`region-compact-check-step`](https://docs.pingcap.com/zh/tidb/v8.5/tikv-configuration-file#region-compact-check-step)</li><li>[`region-compact-min-tombstones`](https://docs.pingcap.com/zh/tidb/v8.5/tikv-configuration-file#region-compact-min-tombstones)</li><li>[`region-compact-tombstones-percent`](https://docs.pingcap.com/zh/tidb/v8.5/tikv-configuration-file#region-compact-tombstones-percent)</li><li>[`region-compact-min-redundant-rows`](https://docs.pingcap.com/zh/tidb/v8.5/tikv-configuration-file#region-compact-min-redundant-rows-从-v710-版本开始引入)</li><li>[`region-compact-redundant-rows-percent`](https://docs.pingcap.com/zh/tidb/v8.5/tikv-configuration-file#region-compact-redundant-rows-percent-从-v710-版本开始引入) </li></ul>| 废弃 | 由 [`gc.auto-compaction`](https://docs.pingcap.com/zh/tidb/v8.5/tikv-configuration-file#gcauto-compaction) 配置组替代，用于控制自动 compaction 行为 [#18727](https://github.com/tikv/tikv/issues/18727) @[v01dstar](https://github.com/v01dstar) |
 | TiKV |[`gc.auto-compaction`](https://docs.pingcap.com/zh/tidb/v8.5/tikv-configuration-file#gcauto-compaction) 配置组包括：<ul><li>[`gc.auto-compaction.check-interval`](https://docs.pingcap.com/zh/tidb/v8.5/tikv-configuration-file#check-interval-从-v757-和-v854-版本开始引入)</li><li>[`gc.auto-compaction.tombstone-num-threshold`](https://docs.pingcap.com/zh/tidb/v8.5/tikv-configuration-file#tombstone-num-threshold-从-v757-和-v854-版本开始引入)</li><li>[`gc.auto-compaction.tombstone-percent-threshold`](https://docs.pingcap.com/zh/tidb/v8.5/tikv-configuration-file#tombstone-percent-threshold-从-v757-和-v854-版本开始引入)</li><li>[`gc.auto-compaction.redundant-rows-threshold`](https://docs.pingcap.com/zh/tidb/v8.5/tikv-configuration-file#redundant-rows-threshold-从-v757-和-v854-版本开始引入)</li><li>[`gc.auto-compaction.redundant-rows-percent-threshold`](https://docs.pingcap.com/zh/tidb/v8.5/tikv-configuration-file#redundant-rows-percent-threshold-从-v757-和-v854-版本开始引入)</li><li>[`gc.auto-compaction.bottommost-level-force`](https://docs.pingcap.com/zh/tidb/v8.5/tikv-configuration-file#bottommost-level-force-从-v757-和-v854-版本开始引入)</li></ul> | 新增 | 该配置组用于控制自动 compaction 行为 [#18727](https://github.com/tikv/tikv/issues/18727) @[v01dstar](https://github.com/v01dstar) |
 | TiFlash | [`flash.graceful_wait_shutdown_timeout`](https://docs.pingcap.com/zh/tidb/v8.5/tiflash-configuration#graceful_wait_shutdown_timeout-从-v854-版本开始引入) | 新增 | 控制 TiFlash 优雅关闭的最长等待时间（秒），默认为 `600` 秒。当关闭 TiFlash 时，TiFlash 会继续执行尚未完成的 MPP 任务，但不再接收新的 MPP 任务。如果所有 MPP 任务在此超时时间前完成，TiFlash 将立即关闭；否则将在等待时间结束后强制关闭。[#10266](https://github.com/pingcap/tiflash/issues/10266) @[gengliqi](https://github.com/gengliqi) |
+| TiCDC | [`scheduler.region-count-per-span`](https://docs.pingcap.com/zh/tidb/v8.5/tiflash-configuration#region-count-per-span-从-v854-版本开始引入) | 新增 | 在 [TiCDC 新架构](https://docs.pingcap.com/zh/tidb/v8.5/ticdc-architecture) 中引入。在 changefeed 初始化时，会根据该参数对满足拆分条件的表进行拆分，每个拆分后的子表最多包含 `region-count-per-span` 个 Region。默认值为 `100`。 |
 
 ### MySQL 兼容性