avoid overriding already WaniKani

src/wanikani.ts

@@ -547,7 +547,7 @@ export class WaniKani {
     });
     if (!vocabMap.size) return;
 
-    query += ` -${fields.ja}:`;
+    query += ` -tag:wanikani -${fields.ja}:`;
 
     const anki = new AnkiConnect();
     anki