Rename Two-Sum.kt to 1-Two-Sum.kt

Author: mitchellirvin

kotlin/Two-Sum.kt renamed to kotlin/1-Two-Sum.kt

@@ -18,4 +18,4 @@ class Solution {
 fun main() {
     val result = Solution().twoSum(intArrayOf(2, 7, 11, 15), 9)
     println(result.contentToString())
-}
+}