Mention about 韻典's data version

Author: syimyuzya

DEVELOP.md

@@ -14,6 +14,7 @@ Maintained by NK2028:
   - `poem_*` fields refer to _poem_'s 廣韻字音表
   - `sbgy_*` fields refer to [宋本廣韻データ](https://kanji-database.sourceforge.net/dict/sbgy/index.html)
   - `ytenx_*` fields refer to [韻典網](https://ytenx.org/)
+    - Data is taken from commit `d95d247` (2023-12-21), which differs from the current (as of Jan. 2025) deployed version (commit `3666370` 2020-03-23) by two 字頭s (小韻 1326 茅→芧, 小韻 2882 匕→𠤎)
 - patches.csv: Corrections to _poem_'s data
 
 ## Build