Modified https://github.com/ERGO-Code/HiGHS/blob/master/highs/Highs.h to https://github.com/ERGO-Code/HiGHS/blob/master/src/Highs.h in src/index.md and src/interfaces/cpp/library.md

Author: jajhall

docs/src/index.md

@@ -50,7 +50,7 @@ also be used to extract solution data and perform other operations relating to
 the incumbent model. The basic functionality is introduced via a [`Guide`](@ref guide-basic),
 with links to examples of its use in the `Python` interface `highspy`. This makes use of the C++
 structures and enums, and is as close as possible to the native C++ library
-calls. These can be studied via the [C++ header file](https://github.com/ERGO-Code/HiGHS/blob/master/highs/Highs.h).
+calls. These can be studied via the [C++ header file](https://github.com/ERGO-Code/HiGHS/blob/master/src/Highs.h).
 
 The C interface cannot make use of the C++ structures and enums, and its methods are documented [explicitly](@ref c-api).
 

docs/src/interfaces/cpp/library.md

@@ -1,4 +1,4 @@
-The HiGHS library is defined in the [`highs/Highs.h`](https://github.com/ERGO-Code/HiGHS/blob/master/highs/Highs.h) header file. It contains the definition of the methods and members of the class. 
+The HiGHS library is defined in the [`highs/Highs.h`](https://github.com/ERGO-Code/HiGHS/blob/master/src/Highs.h) header file. It contains the definition of the methods and members of the class. 
 
 ## Define model