Rename zn_cn.json to zh_cn.json

Author: dovisutu

…/shortswords/shortswords/lang/zn_cn.json …/shortswords/shortswords/lang/zh_cn.jsonprojects/1.21/assets/shortswords/shortswords/lang/zn_cn.json renamed to projects/1.21/assets/shortswords/shortswords/lang/zh_cn.json projects/1.21/assets/shortswords/shortswords/lang/zn_cn.json renamed to projects/1.21/assets/shortswords/shortswords/lang/zh_cn.json

@@ -7,4 +7,4 @@
   "item.shortswords.wooden_short_sword": "木短剑",
   "itemGroup.tab_tab_shorts_swords": "短剑",
   "item.shortswords.diamont_short_sword": "钻石短剑"
-}
+}