Added combsort.cpp entry to readme.md

Author: mulirow

readme.md

@@ -49,6 +49,7 @@ Code | Test
 [0/1 Knapsack Problem](https://github.com/ErR0rpj/code_problems/blob/master/classical_algorithms/c%2B%2B/01_knapsack_problem.cpp) | Missing tests
 [Kadane's Algorithm](https://github.com/ErR0rpj/code_problems/blob/master/classical_algorithms/c%2B%2B/Kadane_Algorithm.cpp) | Missing tests
 [Topological Sort](https://github.com/ErR0rpj/code_problems/blob/master/classical_algorithms/c%2B%2B/Topological_sort.cpp) | Missing Tests
+[Comb Sort](https://github.com/larissalages/code_problems/blob/master/classical_algorithms/c%2B%2B/combsort.cpp) | Missing Tests
 
 # Codeforces