Add Kuki demo video

Author: Tibowl

src/data/gamedata/characters.json

@@ -13222,6 +13222,9 @@
     "weaponType": "Sword",
     "icon": "https://i.imgur.com/iKNCm2s.png",
     "media": {
+      "videos": {
+        "Character Demo - \"Kuki Shinobu: Jack of All Trades\"": "https://youtu.be/13fviLTc0Aw"
+      },
       "imgs": [
         "https://pbs.twimg.com/media/FO7TYvNVgAERTgQ.jpg",
         "https://pbs.twimg.com/media/FO7Sz0zVkAAIpIo.jpg"