fix check_existence query param

lyric_search_new/sources/cache.py

@@ -50,7 +50,7 @@ class Cache:
         logging.debug("Checking whether %s is already stored", 
                       artistsong.replace("\n", " - "))
         check_query = "SELECT id FROM lyrics WHERE artistsong LIKE ? LIMIT 1"
-        params = (artistsong,)
+        params = (f"%{artistsong}%",)
         async with sqlite3.connect(self.cache_db, timeout=2) as db_conn:
             async with db_conn.execute(check_query, params) as db_cursor:
                 result = await db_cursor.fetchone()