Add newline at the end of the file to comply with the CI requirements

Author: KwonNayeon

top-k-frequent-elements/KwonNayeon.py

@@ -30,4 +30,5 @@ def topKFrequent(self, nums: List[int], k: int) -> List[int]:
         sorted_frequency = sorted(frequency.items(), key=lambda x: x[1], reverse=True)
         for i in range(k):
             result.append(sorted_frequency[i][0])
-        return result
+        return result
+