Update and rename Strings/z algo.cpp to strings/z_algorithm.cpp

Author: abranhe

Strings/z algo.cpp renamed to strings/z_algorithm.cpp

@@ -1,13 +1,9 @@
  /*
-
  * C++ Program to Implement Z-Algorithm
-
  */
 
  #include <iostream>
-
  #include <cstring>
-
  #include <vector>
 
  using namespace std;