Update quick_start_cn.md (#3176)

46319943 · web-flow · commit 9cf8c1985a98 · 2023-04-20T14:18:13.000+08:00
diff --git a/docs/source/tts/quick_start_cn.md b/docs/source/tts/quick_start_cn.md
@@ -87,8 +87,8 @@ checkpoint_name
 ├── snapshot_iter_*.pdz
 ├── speech_stats.npy
 ├── phone_id_map.txt
-├── spk_id_map.txt (optimal)
-└── tone_id_map.txt (optimal)
+├── spk_id_map.txt (optional)
+└── tone_id_map.txt (optional)
 ```
 **Vocoders:**
 ```text
