Updated Library Documentation (markdown)

Library-Documentation.md

@@ -1,6 +1,10 @@
 ## libhelper library
 It provides functions, classes and macros that will make your work easier when writing your string program, such as the name `libhelper`.
 
+```c++
+#include <libhelper/lib.hpp>
+```
+
 ---
 
 ### Helpful macros and variables