update tag

scripts/get-kanji-level.ts

@@ -26,6 +26,8 @@ async function makeWaniKaniKanjiLevels(
   for (const k of wkKanji) {
     const { level, characters } = k.data;
     const label = WaniKani.getLevelLabel(level);
+    if (!label) throw new Error(`Invalid level: ${level}`);
+
     const category = `${label.range}: ${
       label.ja
     } ${label.en.toLocaleUpperCase()}`;