message: docs: Update user guide cmake example to use per-language binding lib
diff: @@ -17,7 +17,7 @@ ADIOS exports a CMake package configuration file that allows its targets to be d
  find_package(ADIOS2 REQUIRED)
  #...
  add_library(my_library src1.cxx src2.cxx)
  - target_link_libraries(my_library PRIVATE adios2::adios2 MPI::MPI_C)
  + target_link_libraries(my_library PRIVATE adios2::cxx11_mpi MPI::MPI_C)
  When configuring your project you can then set the ``ADIOS2_ROOT`` or ``ADIOS2_DIR`` environment variables to the install prefix of ADIOS2.
  