Update closest-node-to-path-in-tree.cpp

Author: kamyu104

C++/closest-node-to-path-in-tree.cpp

@@ -289,7 +289,7 @@ class Solution3 {
     };
 };
 
-// Time:  O(n^2 + q * l)
+// Time:  O(n^2 + q * n)
 // Space: O(n^2)
 // bfs
 class Solution4 {