fix: add new line for lint rules

Author: dusunax

top-k-frequent-elements/dusunax.py

@@ -30,4 +30,5 @@ def topKFrequent(self, nums: List[int], k: int) -> List[int]:
         for e in sorted_frequencies: # TC: O(k)
             result.append(e[0])
 
-        return result[0:k]
+        return result[0:k]
+