message: fix minimal-cuda-solver documentation
diff: @@ -11,7 +11,7 @@ The easiest way to use the example data from the data/ folder is to concatenate
  the matrix, the right hand side and the initial solution (in that exact order),
  and pipe the result to the minimal_solver_cuda executable:
  -@code{.cpp}cat data/A.mtx data/b.mtx data/x0.mtx | ./minimal_solver_cuda@endcode
  +@code{.cpp}cat data/A.mtx data/b.mtx data/x0.mtx | ./minimal-cuda-solver@endcode
  <h3> About the example </h3>
  